Little Egret

The little egret (Egretta garzetta) is a slender white heron, typically 55–65 cm long with a wingspan of about 88–106 cm and a weight around 450 g. Adults have a fine black bill, black legs and conspicuously yellow feet. During breeding they develop long ornamental plumes on the head, back and breast, while the bare facial skin becomes more intensely coloured.

White-plumaged western reef herons (Egretta gularis) can look very similar where the two overlap, but little egrets usually show the cleaner combination of black bill, black legs and yellow feet. They are much smaller and more delicate than great egrets and other large white herons.

The boundaries of the little egret have changed repeatedly around the Indian Ocean. The dark-and-white dimorphic form of Madagascar and nearby islands was long treated as the separate dimorphic egret (Egretta dimorpha) and has also been placed with the western reef heron in some classifications.

It is now treated as the subspecies Egretta garzetta dimorpha within the little egret, while the widespread form across Africa, Europe and much of Asia is E. g. garzetta. The changing treatment explains why older and newer sources can place the same island populations under different species.

Little egrets use shallow freshwater and coastal wetlands, including marshes, rivers, lake margins, estuaries, tidal flats, lagoons, mangroves and rice fields. They favour areas where shallow water gives easy access to small aquatic prey.

The species readily uses artificial and heavily modified wetlands as well as natural ones. Water level is important: exposed shallows, tidal channels and receding pools can concentrate prey and attract feeding birds quickly.

Fish dominate the diet in many wetlands, but crustaceans, amphibians, aquatic insects, molluscs and other small animals are also taken. Prey choice changes with habitat, water depth and local availability.

The species readily switches between prey types as conditions change and can therefore exploit both tidal coastlines and inland freshwater habitats.

Little egrets are unusually active hunters. They wade, walk and sometimes run through shallow water, often shuffling or stirring with their bright yellow feet to flush hidden prey before striking. The feet are therefore not merely a field mark but also play a direct role in hunting.

Hunting technique changes with prey. Field studies found more stand-and-wait hunting when birds targeted larger, faster fish, while walking and chasing were used more often for moderately mobile prey. Birds may also flick the wings, rush through shallows or briefly hover, giving the species a flexible repertoire that contrasts with the more static hunting of many larger herons.

Movement varies across the broad range. Many tropical populations are resident or locally dispersive, while birds from colder parts of Europe and Asia migrate south or move to milder coastal areas after breeding.

The species has expanded markedly northwestward in Europe. Little egrets were still rare visitors to Britain until the late twentieth century, first bred there in 1996 and are now established across much of the country. Recent estimates put the British breeding population at around 1,100 pairs. Milder winters appear to have helped survival at the expanding northern edge, together with abundant suitable wetlands.

Little egrets breed colonially, frequently sharing heronries with other herons and waterbirds. The male advertises from the nesting area with displays that include the characteristic Stretch, in which the bill is pointed upward and the ornamental plumes are raised. Nests are usually stick platforms in trees or dense shrubs close to wetlands. Both sexes build, although the male usually brings most of the sticks while the female arranges them.

Clutch size varies geographically. One to seven eggs are recorded; averages are around two to three in much of eastern and southern Africa, while four or five are typical in Britain. The eggs are blue-green, and both parents incubate for roughly 21–25 days. The young remain around the nest and surrounding branches while developing and become fully fledged after roughly 40–45 days.

Hatching is asynchronous, so siblings can differ noticeably in size. A study published in 2020 in a Tunisian colony found that older chicks reached food first and ate more than younger siblings, creating a clear feeding hierarchy within the brood.

The little egret is classified as least concern on the IUCN Red List and remains widespread across Africa, Europe and Asia.

Populations are increasing in some regions, most conspicuously in northwestern Europe. Elsewhere, drainage, altered water levels, pollution and disturbance can reduce local feeding and breeding habitat.