BIRDWALKERMONDAY

Friday, 12 November 2021

3-11-2021 BIOPARC, VALENCIA - COMMON BROWN LEMUR (Eulemur fulvus)

The common brown lemur (Eulemur fulvus) is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte.

The common brown lemur has a total length of 84 to 101 cm (33 to 40 in), including 41 to 51 cm (16 to 20 in) of tail.[5] Weight ranges from 2 to 3 kg (4.4 to 6.6 lb). Common brown lemurs are unique amongst Eulemur in that they exhibit little-to-no sexual dichromatism: in both males and females, the face, muzzle and crown are dark gray or black, with white or tan "cheeks" of varying thickness. Some individuals may have pale-colored eyebrow patches, and the eyes are almost always a deep orange-red. The short, dense fur of the body is primarily brown or gray-brown, with a lighter gray or tan underside. The fur on the back of their hands is often a medium orange or reddish color, and their long, bushy tail may either be similar in color to the dorsal pelage or, more commonly, a darker shade of gray, black, or brown.

Due to the species' history of containing all fellow brown lemurs as subspecies, they are very commonly misidentified in images and texts, and often confused with other species (such as red-fronted lemurs and gray-headed lemurs) or with various other unrelated hybrids.

Similar lemur species within their range include the mongoose lemur (E. mongoz) in the west and the red-bellied lemur (E. rubriventer) in the east. They can be distinguished from these species by the fact that E. mongoz is more of a grey color and E. rubriventer is more reddish. There is also some overlap with the black lemur in northeast Madagascar in the Galoko, Manongarivo and Tsaratanana Massifs. There is also overlap and hybridization with the white-fronted brown lemur, E. albifrons, in the northeast portion of the common brown lemur's range.

The common brown lemur's diet consists primarily of fruits, young leaves, and flowers. In some locations it eats invertebrates, such as cicadas,spiders and millipedes.It also eats bark, sap, soil and red clay (see geophagy). It can tolerate greater levels of toxic compounds from plants than other lemurs can.

The common brown lemur lives in western Madagascar north of the Betsiboka River and eastern Madagascar between the Mangoro River and Tsaratanana, as well as in inland Madagascar connecting the eastern and western ranges. They also live on the island of Mayotte, although this population has been introduced there by man.

Thursday, 11 November 2021

3-11-2021 BIOPARC, VALENCIA - WESTERN GORILLA (Gorilla gorilla)

https://www.inaturalist.org/taxa/43580-Gorilla-gorilla

3-11-2021 BIOPARC, VALENCIA - AFRICAN SPURRED TORTOISE (Centrochelys sulcata)

The African spurred tortoise (Centrochelys sulcata), also called the sulcata tortoise, is a species of tortoise inhabiting the southern edge of the Sahara desert in Africa. It is the largest mainland species of tortoise in the world, and the third-largest in the world. It is the last remaining species in its genus, Centrochelys, with the five other species in the family already extinct.

C. sulcata is currently ranked as an endangered species.] Studies suggest that African spurred tortoises exist in approximately 16.7% of the area where they had previously been found. These studies also show an average of 1-5 tortoises per site canvassed which indicates a rapid decline of the species. The species faces threats from livestock as they have to compete for resources. The main source of resource competition African spurred tortoises face is from cattle which also graze on grass. The effects of competition for grazing land is compounded by wildfires which can destroy large portions of grass land which kills and rescues the resources available to C sulcata. They also face threats from the pet trade as they are over harvested from their natural environment. Approximately 9000 tortoises are taken from the wild for the pet trade. Other threats that the species face are habitat loss due to climate change and predators which hunt the tortoises or their eggs.

3-11-2021 BIOPARC, VALENCIA - GREAT WHITE PELICAN (Pelecanus onocrotalus)

https://www.inaturalist.org/taxa/4327-Pelecanus-onocrotalus

3-11-2021 BIOPARC, VALENCIA - MEERKAT (Suricata suricatta)

The meerkat has a wide distribution in southern Africa, from the extreme southwest of Angola, through Namibia and Botswana, and into the west and north of South Africa. They live in areas with the stony, often calcareous ground in a variety of arid, open habitats with little woody vegetation. Meerkats are common in savannahs, open plains, and rocky areas beside dry rivers. They are absent from true deserts but may occur in semi-desert regions.

The meerkat is like only three other mongoose species, in that it is highly sociable and inhabits territories in packs. A pack usually has 10 to 30 individuals (although much larger ones are not uncommon where the food supply is plentiful) consisting of 3 or 4 family units with a male, female, and their young. Packs can move collectively in search of food, to escape high predator pressure, and during floods. Meerkats live in large burrow systems that are typically 5 m (16 ft) in diameter with around 15 openings; these large underground networks consist of 2 to 3 levels of tunnels. Once meerkats come out of their burrows in the early morning sun to sunbathe, most of them will go off to seek food while the others act as guards or babysit the young. By standing on their hind legs up on mounds and in bushes, the guards are able to have a good view of approaching predators, particularly those in the sky. They will use different alarm calls to alert the group to the danger, and often the whole group will dive into the burrow to hide.

Meerkats exhibit a monogamous mating system, meaning that the dominant male and female of each group are usually the only individuals to successfully breed. However, subordinate females very occasionally will reproduce, and subordinate males will temporarily leave the group to try to mate with females of other groups, which suggests polygynous behavior. The breeding season in the wild runs from October to April, whereas in captivity they breed year-round. Gestation lasts for 11 weeks, with 2 to 5 pups being born. The pups stay in their burrow for three weeks, ‘babysat’ by helpers. When they are four weeks old, the pups will begin to go with the group to forage, and for their first 49 to 63 days will be fed by the helpers, at the same time being taught how to get their own food. The young become independent enough to forage at around 12 weeks of age. This species becomes reproductively mature at about 1 year of age

Meerkats are carnivores (insectivores), eating insects such as scorpions (they are immune to venom), beetles, spiders, crickets, centipedes, millipedes, and worms. They also eat eggs, roots, tubers, small reptiles, and small mammals.

11-11-2021 MONTE CORONA, VALENCIA - EURASIAN SISKIN (Spinus spinus)

https://www.inaturalist.org/taxa/145303-Spinus-spinus

3-11-2021 BIOPARC, VALENCIA - AFRICAN WATTLED LAPWING (Vanellus senegallus)

https://www.inaturalist.org/taxa/4868-Vanellus-senegallus

Wednesday, 10 November 2021

3-11-2021 BIOPARC, VALENCIA - ADDAX (MALE - SUMMER COAT) (Addax nasomaculatus)

The addax (Addax nasomaculatus), also known as the white antelope and the screwhorn antelope, is an antelope native to the Sahara Desert. The only member of the genus Addax, it was first described scientifically by Henri de Blainville in 1816. As suggested by its alternative name, the pale antelope has long, twisted horns – typically 55 to 80 cm (22 to 31 in) in females and 70 to 85 cm (28 to 33 in) in males. Males stand from 105 to 115 cm (41 to 45 in) at the shoulder, with females at 95 to 110 cm (37 to 43 in). They are sexually dimorphic, as the females are smaller than the males. The colour of the coat depends on the season – in the winter, it is greyish-brown with white hindquarters and legs, and long, brown hair on the head, neck, and shoulders; in the summer, the coat turns almost completely white or sandy blonde.

The addax inhabits arid regions, semideserts and sandy and stony deserts. It even occurs in extremely arid areas, with less than 100 mm annual rainfall. It also inhabits deserts with tussock grasses (Stipagrostis species) and succulent thorn scrub Cornulaca. Formerly, the addax was widespread in the Sahelo-Saharan region of Africa, west of the Nile Valley and all countries sharing the Sahara Desert; but today the only known self-sustaining population is present in the Termit Massif Reserve (Niger). However, there are reports of sightings from the eastern Air Mountains (Niger) and Bodélé (Chad). Rare nomads may be seen in northern Niger, southern Algeria and Libya; and the addax is rumoured to be present along the Mali/Mauritania border, though there have been no confirmed sightings. The addax was once abundant in North Africa, native to Chad, Mauritania and Niger. It is extinct in Algeria, Egypt, Libya, Sudan and the Western Sahara. It has been reintroduced into Morocco and Tunisia.

3-11-2021 BIOPARC, VALENCIA - PIN TAILED SANDGROUSE (Pterocles alchata)

The pin-tailed sandgrouse (Pterocles alchata) is a medium large bird in the sandgrouse family. It has a small, pigeon-like head and neck and a sturdy, compact body. It has long pointed wings, which are white underneath, a long tail and a fast direct flight. Flocks fly to watering holes at dawn. The call is a loud kattar-kattar. This gregarious species breeds on dry open treeless plains and similar habitats. Its nest is a ground scrape into which two or three cream-coloured eggs with cryptic markings are laid. Both sexes incubate the eggs.

The pin-tailed sandgrouse is about 35 centimetres (14 in) long. Its head and upperparts are yellowish-green. The underparts are white with a chestnut breast band separating the belly from the green neck. Sexes are somewhat similar, but the female is better camouflaged and has a shorter tail than the male. There are two subspecies; P. a. alchata breeds in southern Europe and P. a. caudacutus breeds in northwestern Africa, the Middle East and southeastern Asia. It is a partial migrant, with some Asian birds moving to the Middle East and northern Pakistan in winter. Males of the eastern race have duller underparts than the European birds, and the females have white, rather than yellow, wing coverts.The pin-tailed sandgrouse is a robust, medium-sized bird about 31 to 39 centimetres (12 to 15 in) in length. The general colouring is cryptic, a blend of barred and flecked olive green, brown, buff, yellow, grey and black. The underparts and the feathered legs are dull white.

The sexes are different and the male's plumage varies with the time of year. In the breeding season, the male has the crown, most of the neck, the back and under-wing coverts a yellowish-green colour with dull yellow spots in the shoulder region. The cheeks are also yellow with a narrow black line extending from the beak, through the eye to the nape of the neck. The irises are brown and the beak is slatey grey. There is a black patch on the throat immediately below the beak and below this, there is a broad, reddish-brown band round the breast, bordered by a thin black stripe above and below the band. The outer wing coverts are chestnut edged with black and white and the primaries are black with pale edges which gives both the leading and trailing edges of the wing the appearance of a black rim in flight. The rump and the tail are distinctly barred in black and brownish-yellow and the streamers on the central tail feathers are slate-grey. Outside the breeding season, all the upper parts, including the crown and cheeks, are barred in black and brownish-yellow and the throat loses its black patch, becoming whitish.

The female is generally similar to the male but the colours are duller. The cheeks and neck are golden-buff and lack the greenish tinge of the male. There is a black stripe running through the eye. The chin is white and there is an additional yellow-buff band across the breast with a broad black stripe above, another thinner one about a third of the way down and a further narrow black stripe at the base. The back and wings are grey, barred with black. The rump and the tail (which has shorter central feathers than the male) are similar in colouration to the male but have finer black barrings.

In flight, the pin-tailed sandgrouse can be identified by its bright, white underparts and under-wing coverts, and the long feathers in the centre part of its tail. It is usually silent when on the ground but in the air communicates with other birds with a frequently uttered, loud "kattar-kattar", a nasal "ga-ga-ga" and a low-pitched "gang gang".

The pin-tailed sandgrouse breeds in North Africa and the Middle East, Turkey, Iran, Iraq and Kazakhstan. In Europe it breeds in Spain, Portugal and the southern part of France. Eastern populations, particularly those from Kazakhstan, migrate to Pakistan and parts of northern India in winter.

The pin-tailed sandgrouse inhabits open areas of stony land, semi arid areas at the edge of deserts, treeless plains and occasionally dried-out mud flats. In winter it may visit ploughed or fallow land but prefers sandy soils and is much less reliant on vegetation cover than the black-bellied sandgrouse (Pterocles orientalis) which has a similar range. It does not occur at elevations above about 1,000 metres (3,300 ft).