Birds include any warm-blooded vertebrate of the class Aves, having a body covered with feathers, forelimbs modified into wings, scaly legs, a beak, and no teeth, and bearing young in a hard-shelled egg. Birds have a beak, which is a hard bill covering the jaw, and a four-chambered heart. It is generally believed that birds are descended from dinosaurs and probably evolved from them during the Jurassic Period. While most paleontologists believe that birds evolved from a small dinosaur called the theropod, which in turn evolved from the thecodont, a reptile from the Triassic Period, other paleontologists believe that birds and dinosaurs both evolved from the thecodont. There are some who even consider the bird to be an actual dinosaur. According to this view, the bird is an avian dinosaur, and the older dinosaur a nonavian dinosaur. Although there are variations of thought on the exact evolution of birds, the similarities between birds and dinosaurs are striking and undeniable. Small meat-eating dinosaurs and primitive birds share about twenty characteristics that neither group shares with any other kind of animal; these include tubular bones, the position of the pelvis, the shape of the shoulder blades, a wishbone-shaped collarbone, and the structure of the eggs. Dinosaurs had scales, and birds have modified scales—their feathers—and scaly feet. Some dinosaurs also may have had feathers; a recently discovered fossil of a small dinosaur indicates that it had a featherlike covering.
Plastic waste is now found everywhere on Earth - from the Artic to the Antartic. From Mount Everest to the bottom of the seas. Plastic pollution ends up in the food chain, and in our drinking water. Plastic pollution kills and damages myriad species and forms of life.
The 100 most distinct and rare birds Philippine's eagle: The Philippine's eagle is at number eight The world's 100 most distinctive and endangered birds have been determined. Scientists in the UK and US chose the birds based on their rarity, but also how distinctive their appearance, behaviour and evolutionary history was. The list of birds contains several of the world's largest and most striking, as well as other unusual species threatened with extinction. Included are the tooth-billed pigeon, known as the little dodo, the Philippine's eagle and a type of kiwi. Scientists at the Zoological Society of London (ZSL), UK and Yale University in New Haven, Connecticut, US created the list as part of the EDGE of Existence programme, which seeks to document the most uniquely vulnerable species on the planet. Details of the exercise are published in the journal Current Biology. Giant ibis. The giant ibis stands tall at the top of the list At number one is a bird called the giant ibis. The largest member of the ibis and spoonbill family, the giant ibis stands over a metre tall, weighs 4.2kg and is the national bird of Cambodia. Despite this, fewer than 230 pairs remain. As well as being more distantly related to other members of its family, the giant ibis is expected to further decline in numbers due to habitat destruction and the predation of its eggs by mammals.
Spoon-billed sandpipers threatened by trapping - China
Spoon-billed sandpipers threatened by trapping in China
Endangered spoon-billed sandpipers arriving at their wintering grounds in China are being threatened by nets designed to trap shorebirds.
The spoon-billed sandpiper is one of the world's rarest birds. Recent sightings of the bird at several new sites along the coast of southern China indicate the species is more widespread than thought. But the study also found evidence of large-scale shorebird trapping using "mist nets" in some of these key areas. Last month four spoon-billed sandpipers were sighted at new wintering grounds in Fucheng, south-west Guangdong Province: the latest evidence that the bird is migrating to more widespread areas in China than previously known.
Wonderful waders
Members of the Hong Kong Bird Watching Society discovered a group of the critically endangered birds in partially drained fishponds in Fucheng.
Shoebill chick is filmed attacking its younger sibling
Aggressive bullying between bizarre-looking shoebill chicks has been filmed for the first time. The encounter was captured at Bangweulu wetlands, near Kasanka, in northern Zambia for the BBC One series Africa. Wildlife filmmakers were surprised to witness an older chick attacking its younger sibling while their mother was foraging away from the nest. The birds are rare subjects for study because their swamp breeding grounds are very difficult to access. The team's aim was to shed light on the species by documenting intimate behaviour of shoebill parents and young at the nest. Siblicide, the phenomenon of offspring killing their siblings, is common among many larger birds.
Up to 900 tropical bird species could 'go extinct'
The wire-tailed manakin faces an uncertain future
Up to 900 species of tropical land birds around the world could become extinct by 2100, researchers say.
The finding is modelled on the effects of a 3.5C Earth surface temperature rise, a Biological Conservation Journal paper shows. Species may struggle to adapt to habitat loss and extreme weather events, author Cagan Sekercioglu says. Mountain, coastal, restricted-range, and species unable to get to higher elevations could be the worst affected.
Let's do the right thing so we never have a silent spring!
The world's 100 most distinctive and endangered birds have been determined. Scientists in the UK and US chose the birds based on their rarity, but also how distinctive their appearance, behaviour and evolutionary history was. The list of birds contains several of the world's largest and most striking, as well as other unusual species threatened with extinction. Included are the tooth-billed pigeon, known as the little dodo, the Philippine's eagle and a type of kiwi. Scientists at the Zoological Society of London (ZSL), UK and Yale University in New Haven, Connecticut, US created the list as part of the EDGE of Existence programme, which seeks to document the most uniquely vulnerable species on the planet. Details of the exercise are published in the journal Current Biology. 
Giant ibis. The giant ibis stands tall at the top of the list At number one is a bird called the giant ibis. The largest member of the ibis and spoonbill family, the giant ibis stands over a metre tall, weighs 4.2kg and is the national bird of Cambodia. Despite this, fewer than 230 pairs remain. As well as being more distantly related to other members of its family, the giant ibis is expected to further decline in numbers due to habitat destruction and the predation of its eggs by mammals.
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