10 most difficult birds riddles

Scything is a feeding technique unique to the avocets. These birds forage in shallow brackish water or on mud flats, scything their bills from side to side in water. They mainly eat crustaceans and insects.

The Philippine eagle also known as the monkey-eating eagle is endemic to the Philippines and can be found on four major islands: eastern Luzon, Samar, Leyte, and Mindanao. The largest numbers of eagles reside on Mindanao, with between 82 and 233 breeding pairs.

Owl's eye colour depends on the time of day in which they hunt. The ones that hunt during daylight have yellow eyes. The ones that hunt at night but also at the evenings and mornings have orange eyes. Black eyes are typical to owls that hunt only at night.

Found in open woods, parks, hedges and cultivated land, the mistle thrush feeds on a wide variety of invertebrates, seeds and berries. Its preferred fruits including those of the mistletoe, holly and yew. Mistletoe is favoured where it is available, and this is reflected in the thrush's English and scientific names.

The sociable weaver is a species of bird endemic to Southern Africa. They build large compound community nests, a rarity among birds. These nests are the largest built by any bird, and are large enough to house over a hundred pairs of birds, containing several generations at a time.

There are both full-sized and bantam Araucanas. They may be either normally tailed or rumpless. The Araucana has a pea comb and lays approximately 250 blue or green eggs per year.

The nest of the long-tailed tit is constructed from four materials - lichen, feathers, spider egg cocoons and moss, with over 6,000 pieces used for a typical nest.

The Indian darter or oriental darter is like all other anhingas, a cormorant-like species that has a very long neck. The structure of the neck is as in other species of darter with strongly developed muscles about a kink in the neck at the 8th and 9th vertebrae that allows it to be flexed and darted forward with rapid force to stab fish underwater. The fibrous representative of Donitz's bridge is seen attached to the ninth cervical vertebra.

Elephant birds were large to enormous flightless birds that once lived on the island of Madagascar. They became extinct, perhaps around 1000-1200 AD, for reasons that are unclear. Its eggs were up to 34 cm long, the largest type of bird egg ever found.

Nightjar, is a crepuscular and nocturnal bird that breeds across most of Europe and temperate Asia. It does not build a nest, and its two grey and brown blotched eggs are laid directly on the ground.