Birds

Many scientists maintain that birds descended from dinosaurs because fossils of dinosaur specimens with feathers have been found. As a group, birds have exceptional eyesight – they have the largest eyes in relation to the size of their bodies. In addition, they have very light bones, which are suitable for flight.

Just like their bills, birds’ fleet have also changed in accordance with the functions and particular needs of each species. For instance walking birds like other vertebrate groups – display a mark the tendency toward having a reduced number of toes, ostriches. Some birds of prey, such as eagles, have fleet that are veritable hooks.

Birds
MammalsBirds
ReptilesFish and Amphibians
Invertebrates

Skeleton and Masculature

Both light weight and resistant, the skeleton of birds underwent important changes in order to adapt to flight. Some bones, like those of the skull and wings fused to become lighter. Birds have fewer bones than other vertebrates. Because their bones are hollow, container internal chambers, the total weight of their bones is less than that of their features.

Birds’ tend to be very flexible in the cervical reason and rigid near the rib cage, where a large, courage of frontal bone called the sternum attaches. The external features a large keel, to which the pectoral muscles attach. These large strong muscles are used for flapping the wings. In contrast, running birds like ostriches have more develop the muscles in their legs.

Internal Organs

Birds in flight can consume oxygen at a rate that a well trained athlete would not be able to with stand for or even a few minutes. Because of this oxygen consumption all their organs have had to adapt. The lungs of birds throw is smaller than those of mammals of similar size are much more efficient.

There lungs have several air sacs that both increase the efficiency of their respiratory system and make them lighter. A special feature of the digestive system is a crop in the oesophagus, where food is stored for digestion or for feeding the young.

Bird

The senses

In birds, the sense organs are concentrated on the head except for the sense of touch which is found all over the body. Birds have the largest eyes with respect to the sides of their bodies. This enables them to see distant objects with a considerable precision. Their field division in very broad over 300 degrees but in general they have little binocular vision.

Feathers

Feathers are the feature that distinguishes birds from all other animals. They make birds strikingly colourful, protect them against cold and intense heat, enable them to move easily through the air and water and hide them from enemies. Fidaa Sara also one of the reasons why human being have domesticated caught and hunted birds.

Wings to fly

Birds wings are highly modified arms that through their unique structure and shape, enables most birds to fly. There are many type of wings: they vary by species. to understand the relationship between being sandeh birds with the concept of wings loading which helps explain the type of flight for each species is useful.

Birds
MammalsBirds
ReptilesFish and Amphibians
Invertebrates

Flapping flight

Most flying birds are flapping flight all the time it consists of moving through the air if rowing with the wings. With each flap, the wing both sustains the bird in the air and pushes its body forwards.

There are different types of lapping flight and different rates of flapping. In general, the larger the bird the more powerful and less frequent its flapping will be. Because flapping is an activity that consumes much energy, birds have adapted a variety of flight patterns: some like hummingbirds, always flap their wings, whereas other alternate flapping with short-term gliding. Dubbing shape also varies according to the bird’s need.

The lives of birds

The behaviour of birds is closely connected to seasons. To survive birds must prepare for the arrival of autumn and winter and adjust their behaviour accordingly. when the time comes to choose a partner the behaviour of males is different from that of females. Some birds couples stay together forever whereas other birds change partners every year.

Amazing Animals

How Birds communicate

Sound is an important form of expression in the lives of the birds. Bird sound can be of two types: calls and songs. The farmer have a simple acoustic structure with few notes. They are associated with coordinating the activities of a group stabilizing communication between parent and their young and maintaining contact between birds during migration.

Songs on the other hand are more complex in rhythm and modulation. they are controlled by the sex hormones, primarily the male hormones. For this reason, males produce the most varied melodies. Songs are linked to sexual behaviour and territorial defence. In general, birds either inherit or learn them.

Bird

Birds Sweet Home

Most birds lay their eggs in a nest where they are incubated by the body heat of an adult sitting on them. To build a next, the couple normally uses mud mixed with saliva, small stones, branches and feathers. When the next is in a visible location, the bird covers it with linchers or loose twins to hide it from predators. There are even birds that use next built by other species.

MammalsBirds
ReptilesFish and Amphibians
Invertebrates

Birds Birth

When a chick is about to hatch, it starts to make itself here from inside the egg. This allows it to communicate with its parents. It then starts to peck at the cell with its egg tooth, which is lost after birth.

Next it turns inside the egg and opens a crack with new perforations, at the same time pushing with its neck and legs until it manages to stick out its head.

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