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Tuesday, 10 December 2024

10-12-2024 CRE DE LONGA, ALBUFERA - WESTERN CATTLE EGRET (Bubulcus ibis ssp. ibis)

The Cattle Egret, a member of the heron family Ardeidae, is a small white bird recognized for its association with grazing animals. It exhibits a stout build, with a wingspan ranging from 88 to 96 cm, and a body length between 46 to 56 cm. The species is relatively light, weighing between 270 to 512 grams. It is characterized by a short, thick neck, a robust bill, and a somewhat hunched posture.

Outside the breeding season, the adult Cattle Egret has predominantly white plumage, a yellow bill, and greyish-yellow legs. Come breeding time, the western variety develops striking orange-buff plumes on the back, breast, and crown, while the bill, legs, and irises turn a vivid red. The eastern variety differs slightly with buff coloration extending to the cheeks and throat during breeding, and the plumes taking on a more golden hue. Both sexes are similar in appearance, though males are marginally larger with longer breeding plumes.

Cattle Egrets are adaptable birds that exploit a variety of drier and open habitats more than other heron species. Their preferred environments include seasonally inundated grasslands, pastures, farmlands, wetlands, and rice paddies.

Originally native to parts of Asia, Africa, and Europe, the Cattle Egret has seen a significant expansion in its distribution, colonizing much of the rest of the world over the last century. It is now found in the tropics, subtropics, and warm-temperate zones globally.

Cattle Egrets are often seen in the company of cattle or other large mammals, benefiting from the insects and small vertebrates these animals disturb. They are known for their migratory behavior, with some populations moving seasonally, while others disperse post-breeding.

At breeding colonies, the Cattle Egret emits a soft, guttural "rick-rack" call but is generally quiet outside this setting.

Breeding occurs in colonies, often near water and in the company of other wading birds. The nest is a platform of sticks in trees or shrubs. Both parents are involved in nest construction and incubation, which lasts about 23 days. Chicks are born with some down and are dependent on their parents for warmth and food.

The Cattle Egret can be confused with other white egrets, but its shorter neck, more robust build, and behavior around livestock help distinguish it.

The diet is varied, primarily consisting of insects like grasshoppers, crickets, and flies. They also consume spiders, frogs, small reptiles, and occasionally bird eggs and chicks. They are known to forage in fields, often near grazing animals, and have been observed following farm machinery to catch disturbed prey.

The Cattle Egret is classified as Least Concern by the IUCN, with an extensive range and a large, stable population. Its successful colonization of new areas has led to it being considered an invasive species in some regions, though it has not yet been noted to have significant negative impacts.

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