Sunday, 17 September 2017
13-9-2017 BIOPARC, VALENCIA - EUROPEAN MOORHEN (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.
The common moorhen emits a variety of gargling calls and will hiss loudly when threatened.
Breeding season sees moorhens becoming territorial. They construct a basket-like nest on the ground within dense vegetation. Egg-laying typically begins in spring, with clutches ranging from 5 to 8 eggs. Both parents are involved in incubation and rearing the young, which fledge after 40-50 days.
Moorhens have a varied diet that includes vegetable matter and small aquatic organisms. They forage in and around water bodies, sometimes upending in the water or walking on lilypads to feed.
Globally, the common moorhen is abundant and classified as Least Concern by the IUCN. However, localized populations may be vulnerable to extinction due to habitat loss and hunting.
Saturday, 16 September 2017
13-9-2017 BIOPARC, VALENCIA - SUPERB STARLING (Lamprotornis superbus)
The superb starling, Lamprotornis superbus, is a small, robust bird with a height of 18 to 19 cm. It boasts a short tail, a long narrow bill, and strong feet. Its plumage is a dazzling display of iridescent blues and greens, a result of light interacting with the structure of the feathers rather than pigmentation. The bird's striking appearance is similar to that of the Hildebrandt's starling, but it can be distinguished by its pale creamy-white eyes and a white breast band in adults.
Adults have a bronzy-black crown and ear-coverts, with a black lore. Their glossy plumage covers the chin, throat, chest, nape, mantle, back, and uppertail-coverts, with the nape showcasing vibrant blue hues. A slender white strip separates the glossy chest from the red-orange abdomen, flanks, and thighs. The vent and the underside of the tail and wings are white. Their irises are creamy-white, and both legs and bills are black. Superb starlings are sexually monomorphic, meaning males and females are visually similar.
Juvenile superb starlings have a more subdued plumage with no glossy sheen except on the tail and wing feathers. Their irises are initially brown, later turning grayish white. The bill is pale yellow with a darker tip, and the legs are brown. By seven months, they acquire adult plumage, though the eyes remain dark and the bill's base shows yellow coloring.
Superb starlings may choose to remain in their birth group or disperse as immigrants. They experience social benefits and conflicts, with larger groups offering enhanced survival chances and reduced reproductive variance.
Superb starlings inhabit savannas, thornbush and acacia arid areas, open woodlands, lakeshore woodlands, gardens, and cultivated fields. They are found at elevations ranging from sea level to 2,650 meters and tend to avoid humid lowland areas.
This species is commonly found in East Africa, including Ethiopia, Somalia, Uganda, Kenya, South Sudan, and Tanzania. They occupy large territories, often exceeding 50 hectares.
Superb starlings are known for their social dynamics, forming groups that can exceed 40 individuals with an approximately equal sex ratio. They are territorial during the breeding season, chasing away other species, especially near their nests. They often join mixed-species flocks, which may aid in foraging and predator defense.
The superb starling's vocal repertoire includes a long and loud song of trills and chatters, a softer midday song, and several harsh calls. Their alarm calls are distinct enough to be recognized by other species, such as vervet monkeys, which respond to the starlings' predator warnings.
Omnivorous and primarily ground feeders, superb starlings feast on insects, berries, small fruits, seeds, and occasionally scavenge on animal carcasses. They are known to extract nectar from sisal flowers and are unafraid of humans, often scavenging around settlements.
Breeding seasons vary by region, with October to February in Ethiopia and March to June in Somalia. Displays include running on the ground and jumping with drooping wings and outstretched heads.
Nests are built in thorn trees, tree holes, cliffs, or rock crevices, often lined with twigs and dry grass. Both sexes contribute to nest building, and nests are sometimes constructed at the base of raptor nests for protection.
Eggs are uniformly dark blue, and females lay 3-4 eggs per clutch. Incubation lasts 12-13 days, with a nestling period of 18-24 days. Nestlings are fed insects, and both parents, along with alloparents, participate in offspring care.
The superb starling is classified as Least Concern by the IUCN, indicating a stable population without significant threats to its survival.
13-9-2017 BIOPARC, VALENCIA - RED CRESTED POCHARD (FEMALE) (Netta rufina)
The red-crested pochard (Netta rufina ) is a large diving duck. The scientific name is derived from Greek Netta "duck", and Latin rufina, "golden-red" (from rufus, "ruddy"). Its breeding habitat is lowland marshes and lakes in southern Europe and it extends from the steppe and semi-desert areas on the Black Sea to Central Asia and Mongolia, wintering in the Indian Subcontinent and Africa. It is somewhat migratory, and northern birds winter further south into north Africa.
The adult male is unmistakable. It has a rounded orange head, red bill and black breast. The flanks are white, the back brown, and the tail black. The female is mainly a pale brown, with a darker back and crown and a whitish face. Eclipse males are like females but with red bills. They are gregarious birds, forming large flocks in winter, often mixed with other diving ducks, such as common pochards. They feed mainly by diving or dabbling. They eat aquatic plants, and typically upend for food more than most diving ducks.
A wheezing veht call can be given by the male. Series of hoarse vrah-vrah-vrah calls can also be heard from females.
Red-crested pochards build nests by the lakeside among vegetation and lay 8–12 pale green eggs. The birds' status in the British Isles is much confused because there have been many escapes and deliberate releases over the years, as well as natural visitors from the continent. However, it is most likely that they are escapees that are now breeding wild and have built up a successful feral population. They are most numerous around areas of England including Gloucestershire, Oxfordshire, Northamptonshire and also spotted in Leicestershire.
The red-crested pochard is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
The red-crested pochard is naturally found in a wide range extending from southern and central Europe across central Asia, as far west as Mongolia. Its attractive appearance has made it a popular bird in wildfowl collections in the UK. Over the years, red-crested pochards have escaped from collections and nested in the wild, leading to an established population in England.
It's possible that some of the red-crested pochards seen in the UK, particularly in southeast England, have arrived on their own from continental Europe. Over the last century, the European population has spread north into the Netherlands and Germany. They are migratory, flying between breeding grounds and wintering sites.
Red-crested pochards are usually found on freshwater lakes and pools, particularly with reedbeds. They often feed at the surface, but can also dive for food. In winter they gather in large flocks.
Friday, 15 September 2017
13-9-2017 BIOPARC, VALENCIA - SADDLE BILLED STORK (Ephippiorhynchus senegalensis)
The saddle-billed stork or saddlebill (Ephippiorhynchus senegalensis ) is a large wading bird in the stork family, Ciconiidae. It is a widespread species which is a resident breeder in sub-Saharan Africa from Sudan, Ethiopia and Kenya south to South Africa, and in The Gambia, Senegal, Côte d'Ivoire and Chad in west Africa. It is considered endangered in South Africa.
It is a close relative of the widespread Asian and Australian black-necked stork, the only other member of the genus Ephippiorhynchus.
The saddle-billed stork, like most of its relatives, feeds mainly on fish, frogs and crabs, but also on large water beetles, small mammals, birds and reptiles. The birds move in a deliberate and stately manner as they hunt, in a similar way to the larger herons.
It is spectacularly plumaged; both the female and male appear identical when perched but the female shows much more white in the primaries in flight. The head, neck, back, wings, and tail are iridescent black, with the rest of the body and the primary flight feathers being white. Juveniles are browner grey in plumage. The massive bill is red with a black band and a yellow frontal shield (the "saddle"). The legs and feet are black with pink hocks. On the chest is a bare red patch of skin, whose colour darkens during breeding season.
At the continental scale, saddle-billed storks preferred protected areas that have a higher extent of open water compared to areas without the storks. Some of these trends may, however, be due to a bias in coverage by ornithologists of safer areas such as national parks and protected swamps that afford easier accessibility and comforts.
They are silent except for bill-clattering at the nest. Like most storks, these fly with the neck outstretched, not retracted like a heron; in flight, the large heavy bill is kept drooping somewhat below belly height, giving these birds a very unusual appearance to those who see them for the first time. To experienced birdwatchers on the other hand, this makes them easily recognizable even if seen from a distance. It has been suggested that due to the large size and unusual appearance in flight, this species is the basis for the "big bird" and kongamato cryptids.
The saddle-billed stork breeds in forested waterlands and other floodlands in tropical lowland. It builds a large, deep stick nest in a tree, laying one to five (typically two or three) white eggs weighing about 146 g (5.1 oz) each. It does not form breeding colonies, and is usually found alone or in pairs. The incubation period is 30–35 days, with another 70–100 days before the chicks fledge, with the young often remaining in the parents' territory until the next breeding season.
13-9-2017 BIOPARC, VALENCIA - PINK BACKED PELICAN (Pelecanus rufescens)
The Pink-backed Pelican (Pelecanus rufescens) is a member of the pelican family, distinguished by its relatively modest size. Adults range from 125 to 155 cm in length, with a wingspan of 2.15 to 2.9 meters, and weigh between 4 to 7 kilograms. The plumage is primarily grey and white, with a subtle pink hue on the back that is never as vivid as that of a flamingo. The bill, measuring 30 to 38 cm, is topped with yellow, and the pouch is typically greyish. During the breeding season, adults may sport elongated feather plumes on their heads.
This species thrives in a variety of aquatic environments, favoring tranquil backwaters with shallow waters. It is commonly found in freshwater lakes, swamps, large rivers with gentle currents, and seasonal pools. It can also be seen in reservoirs, seasonally flooded lands, and floodplains near river mouths, as well as alkaline and saline lakes and lagoons. Coastal presence is limited to bays and estuaries, as it seldom ventures onto the open seashore.
The Pink-backed Pelican is a resident breeder across Africa and southern Arabia. Historically, it was also found in Madagascar, but it has since been extirpated from the island.
This pelican is known to nest colonially in trees, reeds, or low bushes near water bodies, and occasionally on the ground on sandy islands and in mangroves. Nests are constructed close together in nesting trees, which are reused annually until the trees collapse. The species tends to roost in similar environments, including mangroves, sandy islands, cliffs, coral reefs, and sand dunes.
The nest of the Pink-backed Pelican is a substantial heap of sticks, situated anywhere from 10 to 50 meters above the ground. The female typically lays two to three large white eggs. Chicks feed by delving deep into the adult's pouch to consume partially digested, regurgitated fish.
The diet of the Pink-backed Pelican consists mainly of fish, including cichlids like Haplochromis and Tilapia, which can weigh up to 450 grams, though they typically range from 80 to 290 grams. Amphibians also form part of their diet. These pelicans often fish in groups to capture their prey.
The Pink-backed Pelican is currently classified as Least Concern on the IUCN Red List of Threatened Species, indicating that it is not at immediate risk of widespread decline.
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