Tuesday, 26 September 2017
Monday, 25 September 2017
23-9-2017 MONTE CORONA, VALENCIA - CATALONIA WALL LIZARD (Podarcis liolepis)
Podarcis liolepis, the Columbretes wall lizard or Catalan wall lizard, is very similar to the other lizards in the genus Podarcis. This species was formerly described as a subspecies of the Iberian wall lizard, but has now been elevated to species status. These are slender lizards with long tails, narrow tapered heads and long thin toes, and stout legs. Colours are variable, although generally grey-brown. Often very subtle spots and stripes along the back and flanks can be seen and these can be more distinguished in the female. The underside is a much lighter cream or beige with sometimes a reddish tint. Adults grow 15–20 cm in length from the nose to tip of the tail. Body length can be a little as one third of the total body length, the tail making up the other two thirds.
Lifespan around 4–5 years. Sexual maturity is reached in their second year. Breeding takes place in spring after they wake from winter hibernation. 1-5 eggs are laid, each around 5x9mm, in cracks in rocks or under stones. During development the eggs swell and after 8 weeks when ready to hatch they can be 8x15mm in size. They hatch out around early July.
They are found in the north-east of the Iberian peninsula, including southern France in parts of the Pyrenees. They are not found above 3400m elevation.
With a lifespan of about 5 years they are an adaptable wall climbing species which can be found in a large number of habitats and frequently around houses and other buildings. Although being a Mediterranean species, they are able to inhabit mountain habitats with cold winters up to 2000 m altitude (Pyrenees, Sistema Ibérico, Sistema Bético).
The Catalonian Wall Lizard is a quite adaptable, well climbing species which can be found in various habitats and even frequently within human settlements. Although being a (sub-)Mediterranean species, it is able to inhabit mountain habitats with cold winters up to 2000 m altitude (Pyrenees, Sistema Ibérico, Sistema Bético).
Being such a "generalist", its distribution ranges from the French Rhône-Valley in the north to the Spanish Sierra Nevada in the south. It shows a great variability which has led to the description of several subspecies:
Podarcis liolepis cebennensis has been described for southern France. But geographic delimination towards the nominate subspecies is doubtful.
The Spanish Columbretes Archipelago is populated by the dark blotched subspecies atratus. However, this might be just an insular morph of the nominate subspecies.
Subspecies sebastiani has been described for the Basque Country area. Presumably, this may be just an ecotype of the nominate subspecies.
In the south of the range, additional - so far undescribed - colour morphs occur (see below).
With regard to this, some intra-specific taxonomic revision might be required.
Distribution of Podarcis liolepis with its currently recognized subspecies. For an overview of all Iberian Podarcis species see map at Podarcis hispanicus.
In north of the range, Podarcis liolepis has contact zones with Podarcis guadarramae. This species lacks of blue outer ventral scales which frequently occur in males of Podarcis liolepis. Podarcis liolepis may also co-occur with Podarcis muralis (e.g. Penyagolosa, E / Castellón) but it is smaller, more slender und usually shows a lighter colouration than the latter one.
22-9-2017 MONTE CORONA, VALENCIA - GRASS EGGAR MOTH (Lasiocampa trifolii)
Lasiocampa trifolii, the grass eggar, is a moth of the family Lasiocampidae first described by Michael Denis and Ignaz Schiffermüller in 1775 and found in Europe.
Distribution and habitat of this moth is that it is found in Europe in coastal dunes.
Eggs are laid on leaves close to the ground, hatch in the autumn, and the young larvae hibernate. The larvae feed on grasses, various shrubs and deciduous trees, such as oak, European beech, poplar and Calluna. The cocoon is formed on the ground.
Adults' wingspan is 40–55 mm and it flies from June to September depending on the location (in Britain it is on the wing in August). They fly during the day, but also at night, and will come to a light. The female is larger than the male.
The Grass Eggar is reddish-brown in colour with a curved outer cross-line on the forewing and a central white spot. The colour varies with location. The pale form f. flava is a straw or brownish yellow with similar markings.
The adults are incapable of feeding. They fly at night and are attracted to light. The caterpillars can be found from March to July feeding at night. They pupate in a tough brown cocoon on the ground. They overwinter as eggs laid loosely among vegetation.
Size and Family
Family – Eggar moths (Lasiocampidae)
Medium / Large Sized
Wingspan Range – 42-60mm
Conservation Status
UK BAP: Not Listed
Grass Eggar - Nationally Scarce A
Pale Grass Eggar – Red Data Book species
Caterpillar Food Plants
Foodplants vary between areas including False Oat-grass (Arrhenatherum elatus), Tree Lupin (Laburnum arboreus), Marram (Ammophila arenaria), Bramble (Rubus fruiticosus) and Creeping Willow (Salix repens).
Sunday, 24 September 2017
24-9-2017 PEGO MARSHES, ALICANTE - WHITE WAGTAIL (Motacilla alba)
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The White wagtail is a slender bird with the characteristic long, constantly wagging tail of its genus. There are a number of other subspecies, some of which may have arisen because of partial geographical isolation, such as the resident British and Irish form, the pied wagtail M. a. yarrellii, which now also breeds in adjacent areas of the neighbouring European mainland. The Pied wagtail exchanges the grey colour of the nominate form with black (or very dark grey in females), but is otherwise identical in its behaviour. Other subspecies, the validity of some of which is questionable, differ in the colour of the wings, back, and head, or other features. Some rraces show sexual dimorphism during the breeding season. As many as six subspecies may be present in the wintering ground in India or Southeast Asia and here they can be difficult to distinguish.
White wagtails breed throughout Eurasia, only being absent in the Arctic. They also breed in the mountains of Morocco and western Alaska. These birds are residents in the milder parts of their range such as western Europe and the Mediterranean, but migratory in much of the rest of their range. Northern European breeders winter around the Mediterranean and in tropical and subtropical Africa, and Asiatic birds move to the Middle East, India, and Southeast Asia. Birds from the North American population also winter in tropical Asia. White wagtails occupy a wide range of habitats but are absent from deserts. They inhabit grasslands, seashores, rocky shorelines, sand beaches, tidepools, rivers, lakeshores, farmland, gardens, and parks. They are also often found in towns and villages.
24-9-2017 PEGO MARSHES, ALICANTE - WESTERN YELLOW WAGTAIL (Motacilla flava)
The Western yellow wagtail (Motacilla flava) is a small songbird that can be found in Europe, Asia, and Africa. Its common name comes from characteristic tail-pumping behavior and the part of its scientific name 'flava' means 'golden-yellow' from Latin.
The Western yellow wagtail is a slender bird, with the characteristic long, constantly wagging tail. It is the shortest-tailed of the European wagtails. The breeding adult male is basically olive above and yellow below. In other plumages, the yellow may be diluted by white. The heads of breeding males come in a variety of colors and patterns depending on the subspecies.
Western yellow wagtails breed in much of temperate Europe and Asia. Populations in the milder parts, such as western Europe, are resident but northern and eastern populations migrate to Africa and south Asia. Western yellow wagtails prefer open country near water, such as wet meadows, marshes, bogs, pastures near water, damp steppe, and grassy tundra.
Outside of the breeding season, Western yellow wagtails are gregarious and often spend time in flocks. They also gather in large numbers on the night roosts and migrate in flocks. Western yellow wagtails are active during the day spending their time in search of food. They forage by walking on the ground picking insects or seeds and can also search for food items walking in shallow water. They may catch insects on the wing or pick them up while flying over vegetation. Western yellow wagtails frequently wag their tail while foraging. The common call of these birds is a high-pitched 'jeet'. When flying they often produce loud 'pseet' or long 'swee-eep'.
Saturday, 23 September 2017
23-9-2017 RIO SERPIS GANDIA, VALENCIA - GREY HERON (Ardea cinerea)
The Grey Heron (Ardea cinerea) is a statuesque wading bird belonging to the family Ardeidae. It is a familiar sight in both rural and urban settings, often seen standing stoically along the water's edge. An adult Grey Heron is a large bird, reaching up to 100 cm in height, with a wingspan between 155 to 195 cm. It weighs between 1 to 2 kg. The plumage is predominantly ashy-grey above, with a greyish-white underbelly and some black on the flanks. A striking feature is the white head and neck adorned with a broad black stripe that extends from the eye to the black crest. The beak is pinkish-yellow, long, and sharply pointed, while the legs are a brown hue.
When identifying the Grey Heron, look for the white head with the black supercilium and crest, the long grey neck, and the ashy-grey wings and back. The underparts are lighter, and the legs are long and brown. Juveniles can be distinguished by their duller grey neck and smaller crest. The beak is a useful indicator of age, being brighter in breeding adults.
Grey Herons are highly adaptable and can be found in a variety of watery habitats including lakes, rivers, ponds, marshes, and coastal environments. They require shallow waters for foraging or areas with shelving margins where they can wade.
Native to temperate Europe and Asia, as well as parts of Africa, the Grey Heron has a broad range. Northern populations may migrate southwards in autumn, while others remain resident year-round. Vagrant sightings have occurred in the Caribbean, Bermuda, and parts of North America.
The Grey Heron exhibits a slow, deliberate flight with its neck retracted in an S-shape. It is known for its solitary foraging habits, often standing motionless or stalking prey through shallow waters. It is also a communal rooster, often found in trees or cliffs at night.
Thursday, 21 September 2017
21-9-2017 MONTE CORONA , VALENCIA - RED ADMIRAL BUTTERFLY (Vanessa atalanta)
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Vanessa atalanta, the red admiral or, previously, the red admirable, is a well-characterized, medium-sized butterfly with black wings, red bands, and white spots. It has a wingspan of about 2 inches (5 cm). It was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. The red admiral is widely distributed across temperate regions of North Africa, the Americas, Europe, Asia, and the Caribbean. It resides in warmer areas, but migrates north in spring and sometimes again in autumn. Typically found in moist woodlands, the red admiral caterpillar's primary host plant is the stinging nettle (Urtica dioica); it can also be found on the false nettle (Boehmeria cylindrica). The adult butterfly drinks from flowering plants like Buddleia and overripe fruit. Red admirals are territorial; females will only mate with males that hold territory. Males with superior flight abilities are more likely to successfully court females. It is known as an unusually calm butterfly, often allowing observation at a very close distance before flying away, also landing on and using humans as perches.
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The forewing of this butterfly bears on a black ground an oblique vermilion bandand a group of white subapical spots. On the hindwing the larger portion of the distal margin is red, with a row of small black spots and at the anal angle an elongate blue spot. The underside is partly variegated with blue; the forewing is on the whole similar in markings to the upper, while the hindwing is brightly variegated and clouded, bearing black markings, of which those in the cell resemble a figure (on the left wing 18 or 98, on the right 81 or 89); in the middle of the costal area there is a pale patch and in the distal marginal area a row of ocellus-like spots. Sometimes, especially in the female, the red band of the forewing bearsa small white spot in the middle.
The red admiral is found in temperate regions of North Africa, North and Central America, Europe, Asia, and island regions of Hawaii, and the Caribbean.
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