Ostrich can run at up to about 70 km/h (19 m/s; 4r3 mph), the fastest land speed of any bird. source
Ostrich can run at up to about 70 km/h (19 m/s; 4r3 mph), the fastest land speed of any bird.
The ostrich is the largest living species of bird and lays the largest eggs of any living bird. source
The ostrich is the largest living species of bird and lays the largest eggs of any living bird.
Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich.
Most birds are diurnal, but some birds, such as many species of owls and nightjars, are nocturnal or crepuscular (active during twilight hours).
Birds have one of the most complex respiratory systems of all animal groups.
Birds have a very efficient system for diffusing oxygen into the blood; birds have a ten times greater surface area to gas exchange volume than mammals. source
Birds have a very efficient system for diffusing oxygen into the blood; birds have a ten times greater surface area to gas exchange volume than mammals.
Many bird species migrate to take advantage of global differences of seasonal temperatures, therefore optimising availability of food sources and breeding habitat.
Birds communicate using primarily visual and auditory signals. Signals can be interspecific (between species) and intraspecific (within species).
The Amazon is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammals. source
The Amazon is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammals.
One in five of all the bird species in the world live in the rainforests of the Amazon.
Average adults penguin are about 1.1 m (3 ft 7 in) tall and weigh 35 kg (77 lb).
Penguin eggs are smaller than any other bird species when compared proportionally to the weight of the parent birds; at 52 g (2 oz), the little penguin egg is 4.7% of its mothers' weight, and the 450 g (1 lb) emperor penguin egg is 2.3%. source
Penguin eggs are smaller than any other bird species when compared proportionally to the weight of the parent birds; at 52 g (2 oz), the little penguin egg is 4.7% of its mothers' weight, and the 450 g (1 lb) emperor penguin egg is 2.3%.
The great auk is a flightless bird of the alcid family that became extinct in the mid-19th century.
Great auk, Standing about 75 to 85 centimetres (30 to 33 in) tall and weighing around 5 kilograms (11 lb) as adult birds.
Tawny frogmouths are large, big-headed birds that can measure from 34 to 53 cm (13 to 21 in) long.
The fledging period of the tawny frogmouth is 25 – 35 days during which they develop half their adult mass.
Fledge is the stage in a young bird's life when the feathers and wing muscles are sufficiently developed for flight.
Birds are sometimes considered fledged once they leave the nest, even if they still cannot fly.
There are around 10000 different species of birds worldwide.
There are 81 mammal species in Austria and 416 species of birds.
Atlantic puffin is a small bird. It weighs 17.5 ounces and can reach 10 inches in length. Males are slightly bigger than females. source
Atlantic puffin is a small bird. It weighs 17.5 ounces and can reach 10 inches in length. Males are slightly bigger than females.
when mating season starts. Body of Atlantic become more attractive to the opposite sex when their beaks are brightly colored. source
when mating season starts. Body of Atlantic become more attractive to the opposite sex when their beaks are brightly colored.
Adult Bald eagles are 3 feet tall and weigh up to 9 pounds. source
Adult Bald eagles are 3 feet tall and weigh up to 9 pounds.
Bald eagles have excellent eyesight and see things 4-7 times better than humans. source
Bald eagles have excellent eyesight and see things 4-7 times better than humans.
Black panthers are capable of leaping up to 20 feet to catch their prey which includes medium sized animals like deer and monkeys and smaller rabbits and birds. source
Black panthers are capable of leaping up to 20 feet to catch their prey which includes medium sized animals like deer and monkeys and smaller rabbits and birds.
Bluebirds are territorial and prefer open grassland with scattered trees. source
Bluebirds are territorial and prefer open grassland with scattered trees.
The blue jay measures 22–30 cm (9–12 in) from bill to tail. source
The blue jay measures 22–30 cm (9–12 in) from bill to tail.
The bobolink (Dolichonyx oryzivorus) is a small New World blackbird and the only member of the genus Dolichonyx. source
The bobolink (Dolichonyx oryzivorus) is a small New World blackbird and the only member of the genus Dolichonyx.
condors are very large broad-winged soaring birds, the Andean condor being 5 cm shorter (beak to tail) on average than the northern species. source
condors are very large broad-winged soaring birds, the Andean condor being 5 cm shorter (beak to tail) on average than the northern species.
Adult California condor' skin color can range from cream, pink, yellow, or even orange during breeding season. source
Adult California condor' skin color can range from cream, pink, yellow, or even orange during breeding season.