First birds – victims of dinosaurs
First birds – victims of dinosaurs – Paleontologist Jingmal O’Connor made in China discovery,
that the first birds were victims of representatives of the dinosaurs.
– “125 million years ago, dinosaur Microraptor Gui hunted and devoured entirely
representative of primitive birds from the group Enantiornithines.
The find confirms our belief that the dromerosaurs lived on the trees.“
Aggression among animals
Aggression among animals – Many species of animals avoiding battles, shows aggression usually defending the defenseless young. Musk oxen during the attack of wolves to protect offspring by surrounding them with a circle – forming on the outside wall with sharp corners. Blackbirds attack cats located near their outlet. Sow boar in fear of children can compel a man to flee to the tree.
Protected animals Afghanistan
Protected animals Afghanistan – Under the protection of the law is currently 48 species of animals. Recently, into the Red Book of the country entered 15 new endangered species. Together with the smallest bird of the world – Acrocephalus hiwae (so far resulted only two specimens).
Eye evolution – We see the world around us through opsins – proteins containing photosensitive dyes, produced by the receptors of the retina. In humans and other animals with type chordates – Branchiostoma lanceolatum, fish, amphibian, reptile or bird. The variety is known as c–opsin. Meanwhile, in arthropods and cephalopods – so the spiders and octopuses. This is the function differently built r-opsin. So it looks as if nature created two different ways of development of sight, at a very early stage of evolution.
Eye bigger than brain
Eye bigger than brain – Ostrich is one of the largest eyes of all creatures on land. About 5 cm in diameter, or a little more than a standard golf ball. Its brain has a diameter of for approx. 2.4 cm, thus the eye is greater than the brain. A similar relationship has also other birds, for example. Sparrows.
Formation V – The formation of V-shaped, which forms a plurality of types of birds during their migration, is not random. The exact biomechanical study showed that individual birds by trial and error looking for the best place next to a neighbor in the key.From this point of view the formation of the V-shape is most effective, but the members of the formation to increase its effectiveness by coordinating flapping wings. So that there is between the specified time difference.
Huge bird – Prehistoric huge bird confirmed
Huge bird – Researchers from England confirmed the existence of a huge bird. Whose wingspan exceed 6 m. According to the researchers was the bird with the largest wingspan of all known bird species. Prehistoric species pelagornis sandersi was 2-fold greater than today‘s largest bird of the royal albatross, whose wingspan is 3.5 m.
Corvids abilities – can learn simple math
Corvids abilities – The researchers found that the birds of the crow family (Corvidae), which includes ravens, crows, rooks, jackdaws and many other species, understand the importance of a few human words. Ravens and rooks even know how to count at least seven and can learn simple math, such as addition and subtraction. Moreover, Crow recognize herself in the mirror.
Birds pairs – 8615 species live in monogamy
Birds pairs – At the 8700 known species of birds 8615 live in monogamous pairs. But in the remaining 85 (less than a percent of the entire avifauna) reigns polygamy without harems. Their place was taken from them beauty contests.