Unless otherwise noted, all species listed below are considered to occur regularly in Oklahoma as permanent residents, summer or winter visitors, or migrants. Their flight is strong and direct and they are very gregarious. 2017.Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, Jr. Ziolkowski, D. J. and W. A. The Old World cuckoos are Nightjars are medium-sized nocturnal birds that usually nest on the ground. These birds are adapted to an aquatic existence with webbed feet, bills which are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils. They have stout, longish bills and webbed feet. The family Hirundinidae is adapted to aerial feeding. They are small to medium-sized birds with compact bodies, short thick necks, and long, usually pointed, wings.
All have twelve tail feathers and nine primaries. Finches are seed-eating passerine birds, that are small to moderately large and have a strong beak, usually conical and in some species very large. Their preferred habitat is fairly open country, and they eat insects and fruit. At higher elevations roadrunners live in pinyon-juniper woodlands and cholla grasslands. They have small crests.
The bill is long, thin, and sharply hooked. Available from http://www.mbr-pwrc.usgs.gov/bbs/.Sibley, D. A. Woodpeckers are small to medium-sized birds with chisel-like beaks, short legs, stiff tails, and long tongues used for capturing insects. Corvids are above average in size among the Passeriformes, and some of the larger species show high levels of intelligence. Parrots are small to large birds with a characteristic curved beak. Cranes are large, long-legged, and long-necked birds. Sparrows are seed eaters, but they also consume small insects. These birds have very large powerful hooked beaks for tearing flesh from their prey, strong legs, powerful talons, and keen eyesight. They are insectivores.
Most of the species are known as sparrows, but these birds are not closely related to the Old World sparrows which are in the family Passeridae. In general they are shy and secretive birds, making them difficult to observe.
The Paridae are mainly small stocky woodland species with short stout bills.
Scolopacidae is a large diverse family of small to medium-sized shorebirds including the sandpipers, curlews, godwits, shanks, tattlers, woodcocks, snipes, dowitchers, and phalaropes. These birds are of variable size with slender bodies, long tails, and strong legs. The most typical family members occupy dense vegetation in damp environments near lakes, swamps, or rivers. The North American Breeding Bird Survey, results and analysis 1966-2013 (Version 1.30.15).
Storks are large, heavy, long-legged, long-necked wading birds with long stout bills and wide wingspans. The bill is also long, decurved in the case of the ibises, straight and distinctively flattened in the spoonbills. The parents may continue to work on the nest during incubation and build up the sides of the nest as the chicks grow. Their feet are four-toed and webbed. They are typically associated with open woodland. Most larks are fairly dull in appearance. Starlings are small to medium-sized passerine birds. Their food is insects and seeds.
The wood-warblers are a group of small often colorful passerine birds restricted to the New World. They have large forward-facing eyes and ears, a hawk-like beak, and a conspicuous circle of feathers around each eye called a facial disk. It was placed in its own family in 2017. Nuthatches have big heads, short tails, and powerful bills and feet. They are very small insectivorous birds in the genus The thrushes are a group of passerine birds that occur mainly but not exclusively in the Old World. Herons and egrets are medium to large wading birds with long necks and legs. The family Charadriidae includes the plovers, dotterels, and lapwings. Skuas and jaegers are in general medium to large birds, typically with gray or brown plumage, often with white markings on the wings. Nuthatches are small woodland birds.
Between then and July 2020, four additional species have been documented in eBird. They do not have the sophisticated vocal capabilities of the songbirds. Their soft plumage is cryptically colored to resemble bark or leaves. The cardinals are a family of robust, seed-eating birds with strong bills. They have the unusual ability to climb down trees head first, unlike other birds which can only go upwards. Most species have black as a predominant plumage color, often enlivened by yellow, orange, or red. Darters are cormorant-like water birds with very long necks and long, straight beaks. Some species have feet with two toes pointing forward and two backward, while several species have only three toes. They are medium-sized passerines with strong feet.