Smart Bird Fishing with Bread

Smart Bird Fishing with bread

Birds are a group of warm-blooded vertebrates constituting the class Aves (/ˈeɪviːz/), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are over 11,000 living species, more than half of which are passerine, or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. The study of birds is called ornithology

Birds are feathered theropod dinosaurs and constitute the only known living dinosaurs. Likewise, birds are considered reptiles in the modern cladistic sense of the term, and their closest living relatives are the crocodilians. Birds are descendants of the primitive avialans (whose members include Archaeopteryx) which first appeared during the Late Jurassic. According to recent estimates, modern birds (Neornithes) evolved in the Late Cretaceous and diversified dramatically around the time of the Cretaceous–Paleogene extinction event 66 million years ago, which killed off the pterosaurs and all non-avian dinosaurs.
Many social species pass on knowledge across generations, which is considered a form of culture. Birds are social, communicating with visual signals, calls, and songs, and participating in such behaviours as cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially (but not necessarily sexually) monogamous, usually for one breeding season at a time, sometimes for years, and rarely for life. Other species have breeding systems that are polygynous (one male with many females) or, rarely, polyandrous (one female with many males). Birds produce offspring by laying eggs which are fertilised through sexual reproduction. They are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.

Albatross
Black-footed
Laysan
Short-tailed
Anhinga
Auklet
Cassin’s
Crested
Least
Parakeet
Rhinoceros
Avocet, American
Beardless-Tyrannulet, Northern
Bishop, Northern Red
Bittern
American
Least
Blackbird
Brewer’s
Red-winged
Rusty
Tricolored
Yellow-headed
Bluebird
Mountain
Western
Bobolink
Booby, Brown
Brant
Bufflehead
Bunting
Indigo
Lark
Lazuli
Painted
McKay’s
Snow
Varied
Bushtit
Canvasback
Cardinal, Northern
Catbird, Gray
Chat, Yellow-breasted
Chickadee
Chestnut-backed
Mexican
Mountain
Chukar
Coot, American
Cormorant
Brandt’s
Double-crested
Neotropic
Pelagic
Cowbird
Bronzed
Brown-headed
Crane, Sandhill
Creeper, Brown
Crossbill, Red
Crow
American
Fish
Northwestern
Cuckoo, Yellow-billed
Curlew, Long-billed
Dipper, American
Dotterel, Eurasian
Dove
Common Ground-
Eurasian Collared-
Inca
Mourning
Oriental Turtle-
White-winged
Dowitcher
Long-billed
Short-billed
Duck
American Black
Falcated
Fulvous Whistling-
Harlequin
Long-tailed
Ring-necked
Ruddy
Tufted
Wood
Dunlin
Eagle
Golden
Bald

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