Poisonous birds – Not venomous discovered so far
Poisonous birds – No venomous bird has been discovered so far. That is, one whose body would produce a poisonous substance. That would then be transmitted by pecking or wounding with a claw. There are several groups of poisonous birds, that is, poisoning us when we touch or eat them. Their organisms are also probably not producing toxins, but they are able to obtain them from poisonous insects or plants.
Most of them live in New Guinea. Where are several species of Pitohui. Also representatives of the families, store the strong neurotoxin (batrachotoxin) in the skin.
The Gambian Goose from the Anatidae family living in Africa. It accumulates in its tissues another poison, a kantaridine (it gets it from the eaten beetles). Plectropterus gambensis, however, are poisonous only after their consumption. So they gain little thanks to this weapon (except revenge from beyond the grave). On the other hand, other animals of this species benefit from this – a predator who once encountered goose meat will avoid it.
A similar phenomenon applies to the European Common Quail, whose meat is also poisonous, although only for part of the year. Probably quails get their toxin from being eaten plants, and poisoning them are known for a long time and referred to as a coturnism (from the Latin name of the quail Coturnix coturnix).
Oldest pictogram – Presentation of concept
Oldest pictogram – Presentation of concept with image – Archaeologists in Gobekli Tepe
in Turkey have found the oldest pictogram, the representation of the concept with the image.
On one of the obelisks they discovered the drawing of a human head in the wing of the vulture
and the headless human body under the stele. Around the body are birds and scorpions.
According to experts, this is a pictorial representation of a particular event. The drawing comes
from 12 thousands years.
Probably the scene is related to funeral rituals. At that time, people buried dead in open graves,
where they left them to devour predators and scavengers.
The locals believed that the soul of the deceased would then go to heaven. Imagery about
the funeral habits of the then Gobekli Tepe inhabitants, archaeologists gain first of all from
the findings of the oldest temple complex that served as a religious center for a larger region.
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 – Defending the young
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 – Development of sight
Eye evolution – Development of sight – 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.
Feathers red grouse – Alectoris rufa
Feathers red grouse – Alectoris rufa – Based on the complexity of the color pattern of the feathers on the breast of the red ridge (Alectoris rufa). We can determine its health condition. Lorenzo Pérez-Rodriguez from the Museum of Natural Sciences in Madrid. Discovered that the so-called fractal pattern of the mountain range feathers says a lot about its health. Fractal is an infinitely divisible object that always looks the same, even when viewing it at different magnifications.
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.