On average, a mammal has a brain roughly twice as large as that of a bird of the same body size, and ten times as large as that of a reptile of the same body size.

A recent report ( 2006 ) by the NOAA's Southwest Fisheries Science Center in La Jolla, California, indicates that the increased rat presence on Clipperton Island has led to a decline in both crab and bird populations, causing a corresponding increase in both vegetation and coconut palms on the island.

So far, only a single bird species, which has not been named, has been confidently identified from both above and below the K-Pg boundary ( it is present in the Maastrichtian Hell Creek Formation and Danian Fort Union Formation ).

It is because of the scarlet color of cardinals ' vesture that the bird of the same name has become known as such.

Fair Isle has a permanent bird observatory, founded by George Waterston in 1948.

This has led to an alternative English common name for the bird, " garefowl " or " gairfowl ".

While recent evidence suggesting that American Ivory-billed Woodpeckers may still exist in the wild has caused excitement in the Ornithology community, no similar evidence exists for the Cuban Ivory-billed bird, believed to be extinct since the last sighting in the late 1980s.

The island has three endemic bird species, and two endemic subspecies.

Phosphate — in actuality a resource derived from a 1, 000-year cycle of bird droppings — has been mined on the island since 1906.

An example of the opposite case is " cuckoo ", which, due to continuous familiarity with the bird noise down the centuries, has kept approximately the same pronunciation as in Anglo-Saxon times and its vowels have not changed to as in " furrow ".

The bird has just two toes on each foot ( most birds have four ), with the nail on the larger, inner toe resembling a hoof.

Hybridization with the subspecies that evolved southwestwards of its range, S. c. massaicus, has apparently been prevented from occurring on a significant scale by ecological separation, the Somali Ostrich preferring bushland where it browses middle-height vegetation for food while the Masai Ostrich is, like the other subspecies, a grazing bird of the open savanna and miombo habitat.

Rousay is a ' Site of Special Scientific Interest ' with notable cliff formations and wildflower colonies, and has an RSPB bird reserve.

The GEICO company has created a series of television ads that are built around proverbs, such as " A bird in the hand is worth two in the bush ": and " The pen is mightier than the sword "

Conversely, birds of prey-which show distinct reverse sexual dimorphism — tend to be monogamous for long periods or mate for life ; some species like the Snail kite will choose new mates every year, polygyny is noted in many Harriers and polyandry has been observed in the Harris ' Hawk ( notable for being the only bird of prey to regularly live and hunt in family and social groups ) and the aforementioned Galapagos hawk.

Another etymology that has been proposed is English pigeon, a bird sometimes used for carrying brief written messages, especially in times prior to modern telecommunications.

It has declared several bird sanctuaries including Kumana.

The archipelago has fifteen bird sanctuaries, one geotopic protected area and six nature reserves — with Nordaust-Svalbard and Søraust-Svalbard both being larger than any of the national parks.

While wild cats, dogs, feral pigs, black rats, Polynesian rats and mice are present, the island has no known populations of possums, mustelids ( weasels, stoats or ferrets ), hedgehogs, brown rats or deer, thus being a relative haven for native bird and plant populations.

The study of learning became an area of interest and the study of bird song has been a model for studies in neuro-ethology.

The role of hormones and physiology in the control of behaviour has also been aided by bird models.

The use of bird skins to document species has been a standard part of systematic ornithology.

A bird, once it has detected a bird of prey, calls to signal to the bird of prey that it was detected, and that there is no use trying to attack the calling bird.

The SH-60B Seahawk helicopter carries a yellow and red towed MAD array known as a ‘ MAD bird ’, seen on the aft fuselage.

This depiction is consistent with the remains of these birds found at other Israelite Iron Age sites, when the rooster was used as a fighting bird ; they are also pictured on other seals from the period as a symbol of ferocity, such as on the one engraved on a late-seventh-century BC red jasper seal inscribed " Jehoahaz, son of the king ", which likely it belonged to Jehoahaz of Judah " while he was still a prince during his father's life.

Fauna found within the park include rock wallabies, red kangaroos, emus, euros, 100 different species of bird and 80 species of reptile.

A red bird brought a message: " Heaven decrees King Wen of Zhou to punish Yin and possess its empire ".

In 1998, the first created Grey mutation occurred when South African bird breeder Von van Antwerpen and New Zealand partner Jaco Bosman selected F2 Pieds and created the first red African Grey.

The most similar European thrush species is the Redwing ( T. iliacus ), but that bird has a strong white supercilium, red flanks, and shows a red underwing in flight.

This bird has glossy black plumage, a long curved red bill, red legs, and a loud, ringing call.

According to Cornish legend King Arthur did not die after his last battle but rather his soul migrated into the body of a Red-billed Chough, the red colour of its bill and legs being derived from the blood of the last battle and hence killing this bird was unlucky.

This bird has glossy black plumage, a yellow bill, red legs, and distinctive calls.

The White-winged Chough is a large, black bird — at about 45 cm ( 18 in ) only a little smaller than a raven or a little larger than an Australian Magpie — but has red eyes and a finer, slightly down-curved beak, similar to a European Chough.

These red eyes become swollen and brighter in colour when the bird is excited.

The common name for the Red-winged Blackbird is taken from the mainly black adult male's distinctive red shoulder patches, or " epaulets ", which are visible when the bird is flying or displaying.

However, in vast majority of the other Ojibwa language dialects, the bird is called memiskondinimaanganeshiinh, literally meaning " a bird with a very red damn-little shoulder-blade.

" However, in the Odawa language, an Anishinaabe language in Southwestern Ontario and in Michigan, the bird is instead called either as memeskoniinisi (" bird with a red on its wing ") or as memiskonigwiigaans (" with a wing of small and very red ").

Heading into the Great Plains, the Lakota language, another indigenous language spoken throughout much of the bird's Northeastern range, the bird is called wabloša (" wings of red ").

Its head, neck and breast are black ; eyes are yellow ; bill and legs are red ; the rest of the plumage on the bird is a rich dark blue to purple in color.

The Sungrebe is a small slim-bodied water bird, typically 28 – 31 cm long and weighing 130 g. It is mainly brown, with a long neck, blackish tail and a long red bill.

The area contains some of the finest remaining stands of virgin red pine, spruce-balsam fir, and maple-basswood-aspen forest, supporting 141 bird and 53 mammal species, including bald eagles.