BIRDWALKERMONDAY

Tuesday, 10 July 2018

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - GREEN IBERIAN LIZARD (Podarcis virescens)

Podarcis virescens, also known by its common name as Geniez's wall lizard, is a lizard species of the Lacertidae family. Podarcis virescens is commonly found in the Iberian Peninsula, including Spain and Portugal. The lizard's name is derived from Latin due to its color turning from a usual brown color to green during the spring. Podarcis virescens are a moderate sized lizard and robust in build. Colors vary during seasons and range between individuals from white, brown, green, and black. Podarcis virescens have been found in villages and other human-populated areas in Spain and Portugal at elevations of around 840 meters.

Podarcis virescens is a lizard species of a moderate size, although it can be significantly larger than other lizards in the Podarcis genus such as Podarcis carbonelli. Podarcis virescens vary significantly in color with individuals ranging from white to brown or black. Individuals, particularly males, may change color to green during the spring which then disappears in the summer. The underside of the lizard is more yellow in color than other parts of its body. Podarcis virescens are robust in shape and not flattened compared to other lizard species. Males and females are of around the same size between 40 mm and 63 mm.

Podarcis virescens is considered a robust lizard due to its build. Podarcis lizards vary greatly in color and build so Podarcis virescens does not completely share appearance traits with other species of the same genus. This was likely caused by increased diversification in the history of Podarcis lizards, especially during the time period preceding and around the Zanclean flood.

Podarcis virescens have been used in studies on lizard body temperatures and to determine accurate methods of reading lizard body temperatures using non-invasive techniques. Overall, Podarcis virescens were found to have a lower body temperature than other two lizard species which were Lacerta schreiberi and Timon lepidus. This may be due to the smaller size of the Podarcis virescens lizard compared to the other two species. Since Podarcis virescens are smaller than the other lizards studied, they also vary more in temperature when switching between heating and cooling conditions. Due to the availability of the Podarcis virescens lizard, it is possible to use them for similar studies.

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - FERRUGINOUS DUCK (Aythya nyroca)

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - COMMON MALLOW (Malva sylvestris)

Malva sylvestris is a species of the mallow genus Malva, of which it the type species. Known as common mallow to English-speaking Europeans, it acquired the common names of cheeses, high mallow and tall mallow (mauve des bois by the French) as it migrated from its native home in Western Europe, North Africa and Asia through the English-speaking world.

M. sylvestris is a vigorous plant with showy flowers of bright mauve-purple, with dark veins, standing 0.91–1.22 metres (3–4 ft) high and growing freely in meadows, hedgerows and in fallow fields.

It is one of several species of different genera sometimes referred to as Creeping Charlie, a term more commonly applied to Glechoma hederacea (ground ivy).

Common mallow is a herbaceous perennial with an erect or decumbent branched stem up to 1.5 metres (5 ft) tall. The minutely ridged stems are covered with fine soft hairs, sometimes with a slightly bulbous base. The leaves are alternate, with a petiole up to 20 centimetres (8 in) long, simple but palmate, up to 7 cm long by 10 cm wide, with stellate hairs (i.e. several strands radiating from a common center) and prominent veins on the underside.

The flowers are reddish-purple with dark stripes and occur in axillary clusters of 2 to 4 along the main stem with the flowers at the base opening first. There are 5 petals, each being up to 2 cm (3⁄4 in) long, and 5 sepals, 3–6 mm long, which are fused in the lower half, and have broadly triangular lobes. There is also an epicalyx (or false calyx) with oblong segments, two-thirds as long as calyx lobes (2–3 mm long x 1.5 mm wide).

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - WHITE STORK (Ciconia ciconia)

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - EUROPEAN MOORHEN (JUVENILE) (Gallinula chloropus)

The common moorhen, known scientifically as Gallinula chloropus, is a bird of the rail family, Rallidae. It is a bird of striking appearance, with a mix of black and brown plumage, a white under-tail, and white streaks along its flanks. Its legs are a vibrant yellow, and it sports a distinctive red frontal shield. The bill is a matching red with a yellow tip. Juveniles are a duller brown and do not have the red shield.

Adult moorhens can be identified by their red frontal shield, which has a rounded top and fairly parallel sides. The tailward margin of the red unfeathered area is smoothly curved. Their yellow legs and the combination of their black and brown plumage with white markings make them quite distinctive. The young are browner and lack the red shield, making them less conspicuous.

The common moorhen is found in a variety of wetland habitats, including marshes, ponds, canals, and lakes that are rich in vegetation. It is also known to inhabit city parks with suitable water bodies.

This species has a broad distribution across many parts of the Old World. It is not found in polar regions or many tropical rainforests but is otherwise widespread, often being the most common rail species in its range.

Moorhens are known for their secretive nature but can become quite tame in certain areas. They exhibit territorial behavior during the breeding season and are known to aggressively defend their territory against intruders.

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - BARN SWALLOW (Hirundo rustica)

9-7-2018 PETROLA LAKES, ALBACETE - BLACK WINGED STILT (JUVENILE) (Himantopus himantopus)

9-7-2018 PETROLA LAKES, ALBACETE - BLACK WINGED STILT (Himantopus himantopus)

9-7-2018 PETROLA LAKES, ALBACETE - HOUSE SPARROW (FEMALE) (Passer domesticus)

9-7-2018 LAGUNA DEL REY, RUIDERA - WAVYLEAF MULLEIN (Verbascum sinuatum)

9-7-2018 LAGUNA DEL REY, RUIDERA - YELLOW STAR THISTLE (Centaurea solstitialis)

Centaurea solstitialis is an annual herb from the family Asteraceae. During the vegetative stage it forms a rosette of non-spiny leaves, between 5–20 centimetres (2–8 inches) in diameter. As the summer approaches, it produces a flowering stem up to 1 metre (3+1⁄2 feet) in height. The leaves at the base are lobed and range between 5–8 cm (2–3 in) in length, while the ones on the stem are unlobed and smaller. Between May and October, the stem produces numerous spinous flower heads (capitula) about 12–16 millimetres (1⁄2–5⁄8 in) across, containing between 10–50 yellow flowers, with spines between 1–2.5 cm (3⁄8–1 in). Flowers within capitula are pollinated by insects and each capitula produces 10–50 seeds, some with and some without a pappus. It is an annual semelparous species, and will die after reproduction is completed, normally by the end of the summer.

9-7-2018 LAGUNAS DE REY, RUIDERA - ELMLEAF BLACKBERRY (Rubus ulmifolius)

9-7-2018 LAGUNAS DE REY, RUIDERA - GREAT CRESTED GREBE (Podiceps cristatus)

The great crested grebe, Podiceps cristatus, is a water bird of the grebe family, notable for its striking black and white plumage and elaborate courtship displays. It is the largest grebe species found in the Old World, with some larger species in the Americas.

Adults are unmistakable in summer with ornate head and neck decorations. In winter, they are whiter than most grebes, with a distinctive white above the eye and a pink bill. Juveniles can be identified by their black and white striped heads, which they lose upon reaching adulthood.

This species prefers vegetated areas of freshwater lakes for breeding.

The great crested grebe has three subspecies: P. c. cristatus in Eurasia, P. c. infuscatus in Africa, and P. c. australis in Australia, Tasmania, and the South Island of New Zealand. The European subspecies migrates from colder regions, while the African and Australasian subspecies are mainly sedentary.

The great crested grebe is an excellent swimmer and diver, pursuing fish underwater. Its mating display is particularly elaborate, involving synchronized dances and poses.

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - GREAT BANDED GRAYLING BUTTERFLY (Brintesia circe)

Brintesia is a monotypic butterfly genus in the family Nymphalidae and subfamily Satyrinae. Its one species is Brintesia circe, the great banded grayling.

Brintesia circe reaches on average wingspan of 65–80 millimetres (2.6–3.1 in). Its wings are mainly black or dark brown. They have a broad white band at the edge of the basal area of all wings and usually a second white streak on the lower wings. The black eyespots on the underside of the upper wings have a white contour. Brintesia circe is quite similar to Hipparchia fagi, but in the latter the second white streak on the lower wings is always missing and the eyespots have a yellow contour. These butterflies usually rest on the branches of a tree, protected by their cryptic markings, but ready to take off and fly away when disturbed.

The butterflies are on the wing from July till September, flying with preference on grassy inclines where single oak-trees grow, and settle on bare places on the ground, mole-hills and on tree-trunks, always with the head upwards and the wings tightly closed and placed one over the other, the underside being adapted to the bark of trees. They rarely visit flowers, and then usually thistles, but one more often finds them on damp places on the roads. The flight of the males is slow, searching, but tumbling and rather fast when disturbed. In South Europe the species appears to occur everywhere very commonly, and it is still very abundant also in southern Germany (Darmstadt), being but rare in the north, extending to Waldeck and the Harz Mts.; more abundant and stronger in the west, near Toulouse for instance in giant specimens. At the south coast of Europe the species occurs in countless numbers; I counted once near Genoa more than 30 specimens on one tree.

These butterflies fly in one generation from June to September feeding on nectar of flowers. Larvae feed on various herbaceous plants (mainly on Anthoxanthum, Bromus, Festuca and Sesleria species). The young larvae overwinter.

The species can be found in central and southern Europe (Spain, France, Italy, Greece, southern Germany and Poland), in Anatolia and the Caucasus up to Iran.

These butterflies prefer light woodland, grasslands bordering forest edges and generally dry and bushy environments, at an altitude of 0–1,600 metres (0–5,249 ft) above sea level.

Subspecies

Brintesia circe pannonia (Fruhstorfer, 1917)

Brintesia circe venusta (Fruhstorfer, 1909)

8-7-2018 TABLAS DE DAIMIEL, LA MANCHA - EURASIAN REED WARBLER (Acrocephalus scirpaceus)

The Common Reed Warbler, Acrocephalus scirpaceus, is a medium-sized warbler measuring approximately 13 cm in length with a wingspan ranging from 17 to 21 cm. It exhibits an unstreaked brown back with buff underparts. Both sexes are identical in appearance, which is typical for warblers. Juveniles can be distinguished by their richer buff underparts. The species is characterized by a flattened forehead and a robust, pointed bill.

When identifying the Common Reed Warbler, look for its brown, unstreaked back and buff underparts. The bird's supercilium is less pronounced than that of the larger Great Reed Warbler. In flight, observe the wing-span and listen for its distinctive song.

This species is almost exclusively found in reed beds, often with interspersed bushes, providing it with the necessary cover and nesting sites.

The Common Reed Warbler breeds across Europe into the temperate western Palaearctic and is migratory, wintering in sub-Saharan Africa. It is also a resident species in large parts of Africa.

Males typically arrive at breeding grounds a few weeks before females. The species is generally monogamous, with pairs raising up to two broods per season. It is known to be brood parasitized by the Common Cuckoo.

The song of the Common Reed Warbler is a distinctive slow, chattering "jit-jit-jit" with acrocephaline whistles and mimicry.

Nests are built by the female over water, often in reeds, and are deep cylindrical cups. Clutches usually contain three to five pale green eggs with olive or grey speckles. Both parents incubate the eggs, which hatch after 9-12 days. Fledglings leave the nest after 10-12 days but are fed by parents for an additional 10-14 days.

The Great Reed Warbler is similar in appearance but is larger and has a more pronounced supercilium.

The Common Reed Warbler is primarily insectivorous but may occasionally consume plant material such as berries.

Monday, 9 July 2018

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - CRESTED LARK (Galerida cristata)

The Crested Lark (Galerida cristata) is a small, robust passerine bird, approximately 17 cm in height with a wingspan ranging from 29 to 38 cm. It weighs between 37 and 55 grams. Both sexes are similar in appearance, with a brown plumage that is paler on the underparts and a distinctive crest on the head, which is raised prominently during displays. The tail is short with light brown outer feathers, and the underwings exhibit a reddish hue in flight.

Adult Crested Larks are characterized by their brown, streaky plumage with a paler underside. The young birds can be identified by the additional spots on their backs. The species' most notable feature is its crest, which can be seen at all times but is particularly prominent during territorial or courtship displays. In flight, the reddish underwings are a key identification marker.

The Crested Lark is found in dry, open landscapes such as fields, roadsides, and wastelands. It has adapted well to human-altered environments and can often be seen in areas with sparse vegetation, such as sandy patches near railways, docks, and airfields.

This lark has a wide range across temperate Eurasia, from Portugal to northeastern China and eastern India, and in Africa down to Niger. It is a resident bird, meaning it does not migrate seasonally. However, it is a rare vagrant to Great Britain.

The Crested Lark is known for its undulating flight pattern and its melodious, warbling song, which can be heard from high in the sky or at ground level. It is a territorial bird that sings to establish its presence, often from a height of 30 to 60 meters.

The song of the Crested Lark is a liquid series of notes, often transcribed as "whee-whee-wheeoo" or "twee-tee-too." It is a characteristic sound of open country in its range.

The Crested Lark nests on the ground in shallow depressions, using dead grasses and roots to construct its nest. It typically lays three to five brown, finely speckled eggs, which hatch after about 11 to 12 days. The young are precocial and leave the nest early, becoming fully fledged at around 15 to 16 days old. The species often raises two broods per year.

Primarily vegetarian, the Crested Lark feeds on grains and seeds such as oats, wheat, and barley. It also consumes insects, particularly beetles. Juveniles are fed by both parents and start foraging on their own shortly before they are capable of flight.

Sunday, 8 July 2018

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - EURASIAN COLLARED DOVE (Streptopelia decaocto)

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - BOOTED EAGLE (Hieraaetus pennatus)

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - BLACK WINGED STILT (Himantopus himantopus)

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - RED CRESTED POCHARD (FEMALE) (Netta rufina)

The Red-crested Pochard, Netta rufina, is a striking large diving duck. Its name is drawn from the Greek word for duck, 'Netta', and the Latin 'rufina', meaning 'golden-red', a nod to the male's vibrant plumage.

Males are resplendent with a rounded orange head, a red bill, and a contrasting black breast. Their sides are a crisp white, with a brown back and a black tail. Females, on the other hand, are clad in more subdued tones, primarily pale brown with a darker back and crown, and a whitish face. During eclipse, males resemble females but retain their red bills.

These ducks favor lowland marshes and lakes, thriving in the wetland habitats of southern Europe.

The Red-crested Pochard breeds from the steppe and semi-desert regions near the Black Sea to Central Asia and Mongolia. It is a somewhat migratory species, with northern populations wintering in the Indian Subcontinent and Africa.

Gregarious by nature, Red-crested Pochards form large flocks in the winter, often mingling with other diving ducks such as the Common Pochard. They are known to both dive and dabble for their food.

The male emits a distinctive wheezing 'veht', while the female can be heard making a series of hoarse 'vrah-vrah-vrah' calls.

Nests are constructed lakeside amidst vegetation, where they lay clutches of 8–12 pale green eggs.

While unique in appearance, the male Red-crested Pochard can be confused with other pochards during eclipse plumage, but the red bill is a distinguishing feature.

Their diet consists mainly of aquatic plants. These ducks are adept at upending in the water, a method they use more frequently than most diving ducks to forage for food.

The Red-crested Pochard is classified as Least Concern by the IUCN, and it is also a species protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - WHITE HEADED DUCK (FEMALE) (Oxyura leucocephala)

The White-headed Duck, Oxyura leucocephala, presents a striking figure with its distinctive plumage and stout build. Males are adorned with a white head contrasted by a black crown, a blue bill, and a body cloaked in shades of reddish-grey. Females, on the other hand, exhibit a more subdued palette with a dark bill and less vibrant colouring.

Upon encountering this species, one can identify the male by its white head, black cap, and neck, and a blue bill, while the female can be recognized by her grey-brown body, white face, and darker bill and cap. These ducks measure between 43–48 cm in length and weigh approximately 580–750 g.

The White-headed Duck favors lakes with open water and dense vegetation along the margins, which provide essential cover and nesting sites. These habitats include natural lakes and ponds as well as man-made water bodies.

This species has a breeding range that spans from Spain and North Africa to western and central Asia. Sightings have been reported north of their typical range, though the status of these observations is often uncertain due to the potential for escapees from captivity.

The White-headed Duck is an adept diver and swimmer, often opting to escape threats by swimming rather than taking flight. It exhibits a preference for aquatic environments where it can forage and seek refuge.

An omnivorous diet characterizes this species, with a strong inclination towards vegetable matter. They forage by diving and swimming underwater, and display a notable reluctance to fly.

The International Union for Conservation of Nature (IUCN) has classified the White-headed Duck as "Endangered." Populations have seen a significant decline over the past decade, primarily due to habitat loss and hunting. Additionally, the Spanish population faces genetic dilution from interbreeding with the introduced Ruddy Duck (Oxyura jamaicensis), prompting conservation efforts to eradicate the non-native species from western Europe. The species is also protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).

7-7-2018 TABLAS DE DAIMIEL, LA MANCHA - PIED AVOCET (Recurvirostra avosetta)

The pied avocet is a black and white bird with a very long, upturned beak. It lives and breeds in the coastal areas of Europe and Central Asia. In winter, the bird moves to warmer areas - to Africa or South Asia.

The avocet uses its bill to search for food. It puts its bill into the shallow water and sweeps it from side to side to scare up little animals and catch them.

When feeling threatened the pied avocet utters a series of sounds and slightly varies the pitch level. It sounds like the pied avocet approaches its enemy much faster than it really does. With a bit of luck, this will scare its enemy away. This sound effect is called the Doppler effect.

Just think of a fire truck siren. As long as the truck is approaching you, the siren sounds higher. When the truck is driving away from you, it sounds lower. This phenomenon is related to the sound waves. As long as the car is approaching it kind of pushes the sound waves ahead and compresses them, so that they sound higher.