Kingfishers

Ranging in size from tiny dwarf and pygmy kingfishers to the crow-sized kookaburras, kingfishers occupy waterside or wooded habitats around the world. Although some eat no fish, all kingfishers are adept hunters on land or water, seizing prey in their large bills. Most nest in tree holes or in burrows in banks or termite nests. Burrow excavation begins by the pair taking turns diving right into the wall, beak-first, to dislodge the first body-length or so of earth. Aquatic species have an off-axis camshaped lens that allows them to switch instantly between focus points on their retinas as soon as their head is underwater capturing prey.