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Wednesday, 30 October 2019

30-10-2019 ALBUFERA, VALENCIA - CATTLE EGRET (Bubulcus ibis)


The Western Cattle-Egret is a gregarious, white, upland ardeid (Ardeidae), easily recognized by its foraging association with grazing animals and its exaggerated, head-pumping strut. It differs from the Eastern Cattle-Egret (Ardea coromanda) in having less buff-orange breeding plumage in the head and neck regions.

Small, compact white heron with relatively short yellow bill. More frequently seen in dry habitats than other egrets. In breeding season, look for pale salmon color on head and breast and brighter bill. Leg color varies from reddish or yellow during the breeding season to black during the nonbreeding season. Juveniles have dark bill. Always note relatively short, thick neck and short legs compared with other egrets. Often gathers in flocks, frequently following cattle or tractors in fields.


The Western Cattle-Egret is a gregarious, white, upland heron ( Ardeidae ), easily recognized by its foraging association with grazing animals and its exaggerated head-waving. It is distinguished from the Eastern Cattle-Egret (Ardea coromanda) due to having less buffy-orange breeding plumage on the head and neck regions. Its preference for grasslands, lawns, pastures, and grazing animals is quite distinct from that of other herons and egrets, which usually feed in or beside water and not in close association with livestock. In Britain and Europe, it is also known as the buffalo heron, referring to the color of its breeding plumes; but in many languages, it is simply called the cow crane, cow heron, or cowbird, or named after the wild grazing animal with which it is usually associated, e.g., elephant bird, rhinoceros egret, or hippopotamus egret. 
The Western Cattle-Egret's Arabic name, Abu Qerdan, means "father of ticks" and refers to the abundance of ticks on Egyptian herons. Other names that include the word "tick," such as "tickbird," refer to the mistaken belief that they pick attached ticks off grazing animals; instead, most of their prey are insects disturbed by grazing animals. Derivation of the scientific name:Bubulcus(the previous genus) from Latin "belonging to cattle" andibisfrom the Greek in reference to its slightly curved beak like that of the ibis.

30-10-2019 CREU DE LONGA, VALENCIA - EUROPEAN STONECHAT (FEMALE) (Saxicola rubicola)


The European stonechat (Saxicola rubicola) is a small passerine bird that was formerly classed as a subspecies of the common stonechat. Long considered a member of the thrush family, Turdidae, genetic evidence has placed it and its relatives in the Old World flycatcher family, Muscicapidae.

European stonechats breed in heathland, coastal dunes and rough grassland with scattered small shrubs and bramble, open gorse, tussocks or heather. They are short-distance migrants or non-migratory, with part of the population (particularly from northeastern parts of the range, where winters are colder) moving south to winter further south in Europe and more widely in north Africa.

Perky little bird of open country, especially heathland with gorse, moorland, weedy meadows, scrubby marsh margins, and rough grassland with scattered low bushes. Perches atop bushes and on fences, dropping to the ground to feed, before flying back up to a perch. Male distinctive, with blackish head set off by big white patch on sides of neck, orangey breast. Female brownish overall with paler eyebrow (only behind eye, unlike Whinchat), dull orangey breast; shows paler rump in flight, contrasting with solidly blackish tail. Warbled song is short and buzzy. Calls include dry “tchak” and rising “weet.”

30-10-2019 RACO DE OLLA, VALENCIA - BANDED GARDEN SPIDER (Argiope trifasciata ssp. trifasciata)


Argiope trifasciata (the banded garden spider or banded orb weaving spider) is a species of spider native to North and South America, but now found around the world.

They typically begin to appear during autumn from early September to late October as temperatures start dropping. In Egypt, the type locality of this spider, females were found surviving the relatively warm winter months.

Their webs can reach a diameter of about 60 cm. The length of the web depends on the size of the spider. Webs are capable of reaching a total length of two meters.

Originally from the Americas, Argiope trifasciata was introduced worldwide.

In Europe, it can be found on the Iberian Peninsula, the Canary Islands, and Madeira. The similar looking Argiope bruennichi is common in the Azores.


In Africa, the species is recorded from three countries. In South Africa, the species is known from eight of the nine provinces at elevations ranging from 3 to 1,557 m above sea level.

The species constructs orb webs in wetlands, open grassland areas and gardens. The webs are usually placed low in shrubby vegetation sturdy enough to bear their weight. The spider hangs at the hub head-down throughout the day.

In South Africa, the species inhabits all floral biomes except the Nama Karoo and Succulent Karoo biomes, and has also been collected from crops such as cotton, kenaf, lucerne and tomatoes.


In Illinois, Argiope trifasciata hatches in early summer but does not become readily notable until mid-August, when they have grown large enough to make their distinctive webs, which can be up to 60 cm (24 in) in diameter, among stems and bushes. The female rests at the centre of the web facing downwards, with her legs often arranged in pairs, making a cross shape; some female spiders conceal themselves in a hidden location close to the web, being alerted to a potential victim by a non-sticky thread leading to the center.

Some segments of the web often have thicker threads known as stabilimenta forming a decorative pattern. Male spiders are much smaller than females and have their own small webs in close proximity to the females' webs. Argiope trifasciata is diurnal, and feeds on the insects that get snared in the web. Large, powerful prey like paper wasps, are swiftly wrapped in silk to immobilise them, before being injected with toxic saliva.

The silk decorations of Argiope spiders are thought of as visual signals by researchers. Even though the purpose behind the silk decorations made by Argiope trifasciata remains uncertain, there are a few hypotheses: to make the spider appear larger and to act as a warning sign.

It has been shown that webs containing stabilimenta catch fewer insects because they are less cryptic, but on the other hand these webs are less often damaged by birds flying through them.

30-10-2019 ALBUFERA, VALENCIA - WHITE WAGTAIL (Motacilla alba)





30-10-2019 ALBUFERA, VALENCIA - EUROPEAN STARLING (Sturnus vulgaris)


European starlings are social, iridescent birds known for their ability to mimic a wide range of sounds and for forming massive flocks called murmurations. They are omnivores, eating insects, fruits, and seeds, and are highly adaptable to various environments, including urban areas. Originally from Eurasia, they were introduced to North America in 1890 and are now a widespread and common species there, where they are considered invasive and can outcompete native birds for nesting sites. 

Their glossy black feathers have an iridescent sheen of purple and green. In winter, new feathers have white tips that wear off by spring, leaving them speckled.

The bill is dark in winter and turns bright yellow during the breeding season. Males have a blue base to their bill, while females have a pink base.

They are stocky birds, typically 8-9 inches long with a wingspan of about 16 inches. 

They are famous for forming large, synchronized flocks that create spectacular aerial displays, which can help protect them from predators.

Tuesday, 29 October 2019

23-10-2019 BIOPARC, VALENCIA - AFRICAN WATTLED LAPWING (Vanellus senegallus)

29-10-2019 BIOPARC, VALENCIA - LAMENTING GRASSHOPPER (Eyprepocnemis plorans)


Eyprepocnemis plorans, the lamenting grasshopper, is a species of insect in the family Acrididae. It is the type species of the genus Eyprepocnemis, and is found in Africa, parts of the Middle East, and southern Europe. It typically inhabits wetlands and other moist habitats.

This is a medium-sized grasshopper, with females growing to a length of about 4.5 cm (1.8 in), while males are slightly smaller. The general colour is greyish-brown. The head and prothorax have a central dark band edged with paler stripes. The eye has a longitudinal dark streak, a characteristic shared by Anacridium aegyptium, Heteracris annulosa and Heteracris adspersa. The femurs of the hind legs have greenish, blue and yellow striations, and the hind tibia have reddish or bluish iridescence, and black and white spines.



Eyprepocnemis plorans is native to much of Africa, parts of the Middle East such as Iran, and southern Europe, where it is present in southern Greece, southern Italy, Sicily, Sardinia and southern Spain. It seems to be expanding its range northwards in Italy, possibly as a result of putative climate change. It usually occurs in wetlands, reed beds, freshwater and salt marshes, riverside vegetation, coastal vegetation and man-made habitats. It appreciates vertical-growing stems such as reeds, and habitats with tall forbs mixed with lower-growing plants.

Grasshoppers are in general polyphagous, eating vegetation from many different plant sources. Eyprepocnemis plorans feeds mainly on grasses and sedges. The female deposits an egg pod in the ground and the eggs hatch in the spring. The nymphs undergo five moults, becoming more similar to the adult insect at each developmental stage; they do not undergo metamorphosis and mature in the summer. In parts of the range many adults survive the winter. This species is rather wary and is a good flier.


The karyotype of this grasshopper includes a number of B chromosomes (extra chromosomes) and exhibits a very widespread polymorphism; populations in Spain show about 40 different variations in B chromosomes, resulting in an increase in the frequency of chiasmas.

During spermatogenesis in E. plorans, the autosomal chromosomes achieve complete synapsis, but the single X sex chromosome always remains unsynapsed. The autosomal chromosomes are transcriptionally active during the leptotene to zygotene stages of meiosis, whereas the X chromosome is inactive throughout meiosis likely because of specific epigenetic modifications.

This is a common species of grasshopper in suitable habitats. The population fluctuates seasonally, and the main threats are from urbanisation and developments associated with tourism. It has a wide range and the International Union for Conservation of Nature has rated it as being of least concern.

29-10-2019 OLIVA, VALENCIA - HORNET MIMIC HOVER FLY (Volucella zonaria)


Volucella zonaria, the hornet mimic hoverfly, is a species of hoverfly. These flies are capable of buzz pollination.

This species is present in most of Europe, in Tunisia, Iran, Russia (to Far East) and in Mongolia.

In Great Britain, it was only known from two specimens prior to 1940, so was regarded as rare. Since then, it has become increasingly widespread in many parts of the South and South East England, often in association with parks and gardens, where adults are usually seen visiting flowers. Elsewhere in England, only a few scattered records exist.

These hoverflies usually inhabit meadows close to forests.

Volucella zonaria can reach a length of 25 millimetres (0.98 in),[5] with a wingspan of about 40 mm. These very large and wide hoverflies have reddish-brown shining thorax with dark brown marks, and a reddish-brown scutellum. The head shows a waxy yellow face, with yellow forehead and antennae. The large ovoid compound eyes are reddish with dense and short hairs. In the males they are very close to each other, so that the forehead is very narrow. The abdomen is reddish yellow, with two wide black bands. The underside has broad black bars. The first abdominal segment is black. The second tergite is chestnut brown. Wings are amber infused. The legs are basically red-brown, but black at the base.

This species mimics the European hornet (Vespa crabro), by its size, by its appearance and its buzzing flight.

23-10-2019 BIOPARC, VALENCIA - ABDIM'S STORK (Ciconia abdimii)

Monday, 28 October 2019

28-10-2019 MONTE CORONA, VALENCIA - GREEN HUNTSMAN SPIDER (Micrommata ligurina)



28-10-2019 JESUS POBRE, ALICANTE - PAINTED LADY BUTTERFLY (Vanessa cardui)



28-10-2019 JESUS POBRE, ALICANTE - COMMON BLUE BUTTERFLY (Polyommatus icarus)


is a butterfly in the family Lycaenidae and subfamily Polyommatinae. The butterfly is found throughout the Palearctic and has been introduced to North America. Butterflies in the Polyommatinae are collectively called blues, from the coloring of the wings. Common blue males usually have wings that are blue above with a black-brown border and a white fringe. The females are usually brown above with a blue dusting and orange spots.

The Common blue was elected as the national butterfly of Israel in 2023.

This species was first described by Siegmund Adrian von Rottemburg in 1775. Vernacular names that have been given to P. icarus include little blew argus, blew argus, mixed argus, selvedg’d argus, ultramarine blue, caerulean butterfly, and alexis.


Polyommatus icarus has a wingspan of 28–36 millimetres (1.1–1.4 in).[7] The dorsal side of the wings is an iridescent lilac blue, bright violet-blue, or almost hyacinth-blue with a thin black border. Females' wings are brown or black-brown with a row of red reddish yellow spots along the edges of the wings (marginal spots) and usually some blue at the base. The extent of blue and brown is extremely variable depending on location. The top of the wings in the female may be mostly blue, especially in Ireland and Scotland, but it always has red spots. The ventral side has a greyish or dust-grey base colour in the males and a more brownish hue in the females. Both sexes have a row of red or orange spots along the edge of the hindwing and extending onto the forewing, though they are generally fainter there, particularly in the males, where they are sometimes missing altogether. There are about a dozen black-centered white spots (ocelli) on the hindwing and nine on the forewing. These usually include one in the middle of the forewing cell, absent in Chapman's and Escher's blues. The fringes on the outer edge of the wings are uniform white, not crossed with black lines as in the chalkhill and Adonis blues (that is, the common blue lacks checkering).

28-10-2019 JESUS POBRE, ALICANTE - TWO TAILED PASHA (Charaxes jasius)


Charaxes jasius, the two-tailed pasha, is a butterfly in the family Nymphalidae. It is the only European species of the genus Charaxes. Divergence of the Mediterranean species C. jasius from the last common ancestor with its closest related species still flying in the Afrotropical realm most probably occurred around 2 mya, i.e. during the Pliocene.

Charaxes jasius is a medium to large butterfly with a wingspan reaching 76–83 mm in males, the female being larger. Males up to 80–100 mm wingspan, with females even larger, may be found in Morocco. Each hindwing bears two tails, characteristic of most species of the genus. The spring seasonal brood is smaller in size compared with the second and sometimes third broods, and the two tails on each hindwing tend to curve somewhat towards each other resembling a pincer, less so in the later broods with slightly longer straighter tails. The upperside ground colour of the wings is dark brownish-black, with some changeable purplish sheen viewed at varying angles; forewing with suggestion of darker discal bars, postdiscal spots orange; hindwing with whitish patch near costal border, dusted with brownish scales; outer border of both wings deep orange-ochreous, divided by black-scaled veins. Hindwing with small submarginal blue spots, often vestigial; more developed in the female. 


There is some variation in the intensity of the ground colour, and in development of the postdiscal orange spots. The underside has a very characteristic mosaic appearance broadly similar to a number of related species, traversed by a jumble of bands and of brown, reddish, greyish and blackish patches, all edged with a filigree of white. Beyond the inner mosaic, a white complete discal band bridges across fore- to hindwings. The outer orange marginal coloration is present on the underside also. The female resembles the male but is larger.


This species occurs along the European Mediterranean coast from west Portugal to the coastal islands of Greece (except for the northern Adriatic sea coast), from the central and south peninsula of Italy to Istria, and the coastline of southern Anatolia including Samos, Ikaria and Rhodes. Its range includes the Balearic Islands, Corsica, Sardinia, Corfu and Crete. Inland, the butterfly is found in locally in Spain from Huelva and Málaga to Madrid and Salamanca. In France, the butterfly is found isolated inland from Provence to Lozère, Ardèche and Aveyron. Further around the Eastern Mediterranean coast, it occurs in Turkey, Lebanon, Israel, and continues along much of North African coast to the Atlantic Moroccan NW coast as far as coastal Tiznit environs, venturing inland in a very few Moroccan locations as high as 2,400m asl.


Its typical habitat around the Mediterranean Basin is the Maquis shrubland, up to 700–800 meters above sea level. This comprises thick, mixed scrub forests, often on hillsides, in hot and dry regions. The butterfly is found wherever its larval host plants are abundantly available.

The two-tailed pasha is a fast-flying butterfly that displays territorial behaviour. The butterfly also is a noted for hill-topping. The adults of both sexes are attracted to fermenting fruits; they are attracted to the ethanol contained therein, and can be baited with wine and other alcoholic beverages.

Charaxes jasius is bivoltine or trivoltine, i.e. it has two or three generations per year depending on latitude and altitude.

Typically, the first batch of eggs are laid in May–June and the second in mid August–mid October. The second batch caterpillars spend the winter in the larval stage, and pupate the next spring. The female lays the eggs on the upper surface of the leaves of the host plant, laying no more than one egg per leaf.

Sunday, 27 October 2019

23-10-2019 BIOPARC, VALENCIA - KLIPSPRINGER (Oreotragus oreotragus)


A klipspringer is a small African antelope renowned for its incredible agility on rocky terrain, with specially adapted hooves that allow it to jump 10 to 15 feet straight up. Found in eastern and southern Africa, this species has hollow, brittle hairs for insulation and communicates with whistles to alert others to danger. Klipspringers are monogamous, often forming lifelong pair bonds, and are highly adapted to their arid, mountainous habitats, where they feed on flowers, shoots, and fruits and are not dependent on drinking water.

Klipspringer populations are generally stable, with much of their habitat being rocky and inaccessible.
Climate change, leading to drought and altering forage resources, poses a potential threat to their populations, particularly in the western parts of their range. 


Size: They are small, standing about 20 inches tall and weighing between 22-40 pounds.
Fur: Their fur is grizzled, with hairs that are hollow, flattened, and springy, providing excellent insulation and protection during falls.
Hooves: Their hooves are small, cylindrical, and rubbery on the inside with hard rims, allowing them to grip rocks like a suction cup.
Horns: Only males have horns, which are short and spiky.
Other features: They have large ears, rudimentary tails, and dark preorbital glands near their eyes that secrete pheromones for communication. 
Habitat and Behavior
Habitat: Klipspringers inhabit rocky, arid environments, including mountains and koppies, in eastern and southern Africa.
Diet: They are selective browsers, feeding on flowers, tender green shoots, and fruits.
Movement: They are exceptional rock climbers and can jump significant heights to navigate their rocky homes.
Communication: They use whistles to communicate with their mates and alert them to predators.
Social structure: Klipspringers form lifelong pair bonds and often live as monogamous pairs.
Reproduction: After a gestation period, a single offspring is born and is hidden by the mother for the first few months of its life. 

23-10-2019 BIOPARC, VANCIA - GRANT'S ZEBRA (Equus quagga ssp. boehmi)


23-10-2019 BIOPARC, VALENCIA - RIVER COOTER (Pseudemys concinna)

23-10-2019 BIOPARC, VALENCIA - WHITE HEADED VULTURE (Trigonoceps occipitalis)


The white-headed vulture (Trigonoceps occipitalis) is an Old World vulture endemic to Africa. Populations have been declining steeply in recent years due to habitat degradation and poisoning of vultures at carcasses. An extinct relative was also present in the Indonesian island of Flores during the Late Pleistocene, indicating that the genus was more widespread in the past.

The white-headed vulture is a medium-sized vulture, 72–85 centimetres (28–33 in) in length and with a wingspan of 207–230 centimetres (81–91 in). Females have an average weight of 4.7 kilograms (10 lb), while males are generally lighter at 4 kilograms (8.8 lb) or less. This species is unique among African vultures as it shows a degree of reversed sexual dimorphism, where females are somewhat larger than males.

It has a pink beak and a white crest, and the featherless areas on its head are pale. It has dark brown upper parts and black tail feathers. The feathers on its lower parts and legs are white, giving it its diagnostic image from below. These vultures are easily distinguishable from all other vulture species as the plumage exhibits a strong contrast between black and white. Individual white-headed vultures can also be reliably identified based on a unique pattern in their median wing coverts.


The white-headed vulture is widely spread throughout sub-Saharan Africa, occurring from Senegal and Gambia east to Somalia and south to South Africa and Eswatini. It is locally uncommon to common. A total population of 10,500-18,750 individuals has been estimated, but newer estimates following recent declines suggest a population of just 5,500 individuals. It is estimated that 400 protected areas contain 1893 White-headed vulture nests, with 721 nests occurring in East Africa, 548 in Central Africa, 468 in Southern Africa and 156 in West Africa. The species prefers mixed, dry woodland at low altitudes. It occurs at elevations of up to 4,000 m (13,000 ft) in Ethiopia, perhaps 3,000 m (9,800 ft) in Kenya, and can be found in thorny Acacia-dominated landscape in Botswana. It generally avoids human habitation  and are considered to be restricted to protected areas. For example, the Kruger National Park and neighboring conservation areas hold the largest population of the species in South Africa.

25-10-2019 MONTE CORONA, VALENCIA - HAIRY ROSE BEETLE (Tropinota squalida)


27-10-2019 ADOR CAMPO, VALENCIA - EURASIAN MAGPIE (Pica pica)


The Eurasian magpie, or common magpie (Pica pica), is a striking bird that graces the northern reaches of the Eurasian continent. It is a member of the crow family, known as corvids, and is part of the "monochrome" magpie group within the Holarctic radiation. The bird is easily recognized by its black and white plumage and long, iridescent tail.

Adult Eurasian magpies measure 44–46 cm in length, with over half of this being the tail. They have a wingspan of 52–62 cm. The head, neck, and breast are glossy black with a metallic sheen of green and violet, while the belly and scapulars are pure white. The wings are black with green or purple gloss, and the primaries have white inner webs. The tail is black with green and reddish-purple gloss. Both sexes have similar plumage, though females are slightly smaller.

The Eurasian magpie favors open countryside with scattered trees, avoiding dense forests and treeless areas. It adapts well to suburban environments, including parks and gardens, and can be found in city centers.

This magpie's range spans temperate Eurasia from the western edges of Portugal and Spain to the eastern limits of the Kamchatka Peninsula.

27-10-2019 ADOR CAMPO, VALENCIA - PAINTED LADY BUTTERFLY (Vanessa cardui)



27-10-2019 ADOR CAMPO, VALENCIA - LAMENTING GRASSHOPPER (Eyprepocnemis plorans)


Eyprepocnemis plorans, the lamenting grasshopper, is a species of insect in the family Acrididae. It is the type species of the genus Eyprepocnemis, and is found in Africa, parts of the Middle East, and southern Europe. It typically inhabits wetlands and other moist habitats.
This is a medium-sized grasshopper, with females growing to a length of about 4.5 cm (1.8 in), while males are slightly smaller. The general colour is greyish-brown. The head and prothorax have a central dark band edged with paler stripes. The eye has a longitudinal dark streak, a characteristic shared by Anacridium aegyptium, Heteracris annulosa and Heteracris adspersa. The femurs of the hind legs have greenish, blue and yellow striations, and the hind tibia have reddish or bluish iridescence, and black and white spines.


Eyprepocnemis plorans is native to much of Africa, parts of the Middle East such as Iran, and southern Europe, where it is present in southern Greece, southern Italy, Sicily, Sardinia and southern Spain. It seems to be expanding its range northwards in Italy, possibly as a result of putative climate change.[3] It usually occurs in wetlands, reed beds, freshwater and salt marshes, riverside vegetation, coastal vegetation and man-made habitats. It appreciates vertical-growing stems such as reeds, and habitats with tall forbs mixed with lower-growing plants.

27-10-2019 ADOR CAMPO, VALENCIA - COMMON BUZZARD (Buteo buteo)




The common buzzard (Buteo buteo) is a medium-to-large bird of prey which has a large range. It is a member of the genus Buteo in the family Accipitridae. The species lives in most of Europe and extends its breeding range across much of the Palearctic as far as northwestern China (Tian Shan), far western Siberia and northwestern Mongolia. Over much of its range, it is a year-round resident. However, buzzards from the colder parts of the Northern Hemisphere as well as those that breed in the eastern part of their range typically migrate south for the northern winter, many journeying as far as South Africa.

The common buzzard is an opportunistic predator that can take a wide variety of prey, but it feeds mostly on small mammals, especially rodents such as voles. It typically hunts from a perch. Like most accipitrid birds of prey, it builds a nest, typically in trees in this species, and is a devoted parent to a relatively small brood of young. The common buzzard appears to be the most common diurnal raptor in Europe, as estimates of its total global population run well into the millions.

26-10-2019 MONTE CORONA, VALENCIA - PAINTED LADY BUTTERFLY (Vanessa cardui)


Vanessa cardui is the most widespread of all butterfly species. It is commonly called the painted lady, or formerly in North America the cosmopolitan.

V. cardui occurs in any temperate zone, including mountains in the tropics. The species is resident only in warmer areas, but migrates in spring, and sometimes again in autumn. It migrates from North Africa and the Mediterranean to Britain and Europe in May and June, occasionally reaching Iceland, and from the Red Sea basin, via Israel and Cyprus, to Turkey in March and April. The occasional autumn migration made by V. cardui is likely for the inspection of resource changes; it consists of a round trip from Europe to Africa.


For decades, naturalists have debated whether the offspring of these immigrants ever make a southwards return migration. Research suggests that British painted ladies do undertake an autumn migration, making 14,500 km (9,000 mi) round trip from tropical Africa to the Arctic Circle in a series of steps by up to six successive generations. The Radar Entomology Unit at Rothamsted Research provided evidence that autumn migrations take place at high altitude, which explains why these migrations are seldom witnessed. In recent years, thanks to the activity of The Worldwide Painted Lady Migration citizen science project, led by the Barcelona-based Institute of Evolutionary Biology (Catalan: Institut de Biologia Evolutiva), the huge range of migration has begun to be revealed. For example, some butterflies migrated from Iceland to the Sahara desert, and even further south.


V. cardui is known for its distinct migratory behaviour. In California, they are usually seen flying from north to north-west. These migrations appear to be partially initiated by heavy winter rains in the desert where rainfall controls the growth of larval food plants. In March 2019, after heavy rain produced an abundance of vegetation in the deserts, Southern California saw these butterflies migrating by the millions across the state.
Similarly, heavier than usual rain during the 2018-2019 winter seems to have been the cause of the extraordinarily large migration observed in Israel at the end of March, estimated at a billion individual butterflies. Painted lady migration patterns are highly erratic and they do not migrate every year. Some evidence suggests that global climatic events, such as el Niño, may affect the migratory behaviour of the painted lady butterflies, causing large-scale migrations. The first noticeable wave of migration in eastern Ukraine was noted in the 20s of April 2019. From May 15, numbers began to grow and it was possible to observe hundreds of this species in the Kharkiv region of Ukraine, including in the city streets of Kharkiv.

Saturday, 26 October 2019

23-10-2019 BIOPARC, VALENCIA - WHITE BACKED VULTURE (Gyps africanus)


The population size of the white-backed vulture has been decreasing significantly within the past few decades. In 1992, the population was estimated at 270,000. Over the past two decades, its population has noticeably decreased. BirdLife international estimated that over the past 40 years, the population of the white-backed vulture has decreased annually by a mean of 4.1%, culminating to an overall decline that lies between 63 and 89%, and such harrowing declines have also been recorded in the populations of its other African relatives. A recent study found that white-backed vultures have a high survival rate. Individual adults have the highest survival rate, while 2 year old birds have the lowest survival rate. Across all ages, the survival rate is estimated to be 90.7%. This means that the deaths of adult vultures will lead to rapid population declines. The loss of adults will cause less reproduction and with younger birds less likely to survive, the population will drop drastically. A major cause of population decrease is the loss of habitat and anthropogenic disturbance. Fires have also caused the destruction of trees used for nesting habitat. Humans also have a large impact. Power lines have caused many vultures to be electrocuted. In Kenya especially, humans are using a toxic pesticide called Furadan, which has led to many vulture deaths. Vultures are also being poisoned by humans, although not intentionally. In order to kill hyenas, lions, and other predators, herders add poisons into their livestock. Vultures ingest the poison upon eating a deceased animal's carcass. This poisoning generally occurs outside of protected areas but is a leading factor in the population's decline. Habitats are also being disturbed by human land management and direct nesting persecution patterns.



23-10-2019 BIOPARC, VALENCIA - RED RIVER HOG (Potamochoerus porcus)