swallows and martins are a true symbol of the warm summer evenings.They are carried at an incredible rate over the heads of people, deftly catching flies and other small insects.Of course, these are completely different species, but the similarities between the robin and swifts obvious.Consider the most significant examples.
Both species are widely distributed not only throughout the country but also around the world.Considering that the High North is not enough insects, swallows and swifts there is also no.Most of them in terms of steppe zones.Dimensions and general anatomical structure of these birds are also similar.
This similarity between Swifts swallow and caused almost identical way of life.All of them eat only insects, grabbing them directly in flight.That is why they are sharp and elongated wings, a beak and almost atrophied leg limb.
swallows and swifts actually spends all his time in the air, catching edible trifle.Both species feed their chicks original dish: the insects caught in its beak with adhesive saliva together in "bag", which treats young.As you can see, the similarities between a swallow and swifts there.
In addition, these extremely rare birds sit on the ground.This is due to the already mentioned our legs atrophy.Once on the surface of the soil, they can not retain its holder in a vertical position, and therefore the bird takes off, only relying on advanced and powerful wings.
By the way, contrary to popular opinion, both of these birds can fly up from the ground (we wrote about it), but where do they simply have nothing.Crawling large insects they are not interested, and become food of a predator, they may very quickly.
In the structure of the legs is shown another similarity between swifts and swallow: it is designed so that the bird can be engaged for a completely vertical surface, which helps members of these species nest on steep cliffs where predators are just physically can not get there.
But in the same foot lies the difference between a swallow from swift.In this limb Swift tetradigitate, the fingers are placed in different directions.Grab a branch or wire, he just can not.
a swallow as one finger to the rear: this foot is easy to grab hold of a tree branch or wire.If you see a bunch of birds on the telegraph wires, it swallows it.
But what is the main feature that unites two different species?It's about power.Sweeps over us in his rapid flight, they eat kilos gnats, mosquitoes and other harmful insects.
When some areas midland few swallows and swifts, it is immediately evident in the sharp increase in the number of blood-sucking insects.Not only do they deliver a person a lot of inconvenience, but also carry a whole bunch of diseases, and because of these birds must be protected.
In general, all the birds (swallows and swifts - including) are an integral part of biogeocoenose, which is inhabited.Any potentially harmful human activities for them eventually turned against him.Remember this!
