Cattle Egrets are a species of heron found across many countries of the world, particularly the southern hemisphere. They are most closely related to the “Ardea” family of herons which includes the grey heron. They are white, with brown-cream sections during the breeding season. They are social birds that nest in colonies with many other cattle egrets. Rarely, female cattle egrets will lay eggs in others’ nests, or even those of other species such as the little blue heron.
Photograph by Atamari [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons