BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Little blue heron (Egretta caerulea) fishing by a river. This waterbird ranges from southern North America to northern South America, where it lives in lagoons, swamps and marshes, feeding mainly on fish, frogs and insects. Little blue herons may grow to around 60 centimetres in height. Photographed in Tobago.
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