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The genus Sula was introduced by the French zoologist Mathurin Jacques Brisson in 1760. [3] The type species is the brown booby. [4] The name is derived from súla, the Old Norse and Icelandic word for the other member of the family Sulidae, the gannet.
Juvenile birds are more yellowish and have fewer contrasting colors. They become similar to mature ones in September, although some parts of the wings are kept until May/June next year. [15] Blue tits can also see in ultraviolet light, which is one of the ways they can distinguish whether the bird they're seeing is a male, female or juvenile. [16]
The spotted palm thrush (Cichladusa guttata), also known as the spotted morning-thrush, is a species of bird in the Muscicapidae family. They are small birds mostly consisting of the colors brown, black, and cream. [2] They can be found in eastern African countries such as Ethiopia, Kenya, Somalia, Sudan, Tanzania, and Uganda. [3]
The blue-footed booby (Sula nebouxii) is a marine bird native to subtropical and tropical regions of the eastern Pacific Ocean. It is one of six species of the genus Sula – known as boobies. It is easily recognizable by its distinctive bright blue feet, which is a sexually selected trait and a product of their diet. Males display their feet ...
The bearded reedling (Panurus biarmicus) is a small, long-tailed passerine bird found in reed beds near water in the temperate zone of Eurasia.It is frequently known as the bearded tit or the bearded parrotbill, as it historically was believed to be closely related to tits or parrotbills.
The northern nutcracker (Nucifraga caryocatactes), previously known as spotted nutcracker and Eurasian nutcracker, is a passerine bird in the crow family Corvidae. It is slightly larger than the Eurasian jay but has a much larger bill and a slimmer looking head without any crest. The feathering over its body is predominantly chocolate brown ...
The birds are about 20 to 22 inches long, according to Audubon, about the size of a mallard duck. Adults have long necks and legs, a color pattern of chestnut, black and gray, and have pink bills.
These birds are mainly small, stocky, woodland species with short, stout bills. Some have crests. They range in length from 10 to 22 cm (3.9 to 8.7 in). They are adaptable birds, with a mixed diet including seeds and insects. [3] Many species live around human habitation and come readily to bird feeders for nuts or seed, and learn to take other ...