Goliath heron (Ardea goliath) wading in a lagoon. This is the largest and tallest heron in the world. Its long legs allow it to wade deep into lakes, swamps and rivers, where it catches fish, frogs, small mammals, reptiles and invertebrates with a darting strike of its head. This aquatic bird is a solitary forager and as it usually takes a while to swallow large fish it is vulnerable to kleptoparasitism. It is found in parts of Africa, the Middle East and the Indian subcontinent. Photographed in Kwa-Zulu Natal, South Africa.