Derbnik a small falcon, resembles a dove. The birds are rare, propagated in various places in open areas in Alaska, in Canada, North and West of the United States, Europe and Asia, and live suburban and urban areas.
The appearance of the derbar
They are a little larger than the empty. Like other falcons, they have long thin wings and tails, and they are actively flying, making short, powerful, similar to the piston wings. Unlike other falcons, derbeniks do not have a set-out mustache on his head.
Males and females and representatives of the subspecies differ from each other. Minor birds of both sexes resemble adult females. Males with bluish-gray backs and wings, on black tails of 2-5 thin gray strips. On the bottom of the body, dark stripes, reddish spots on the sides of the chest. The females have dark brown backs, wings and tails with thin stripes of lush skin. Buywill’s bottom belt with stripes. Females are about 10% more in size and 30% heavier.
Features of the propagation of the derbar
As a rule, birds are monogamous. Steam members winter separately, and each spring a new pair communication is formed or old is restored. Derbniks return to the same reproduction zone, occupy the same nesting territory. Nests are not used again.
“Hardworking” birds
Males return to the propagation places a month earlier. In some cases, females remain on the nesting territory throughout the year. Derbniks do not build, use abandoned nests of other birds, predators or forty. This species also lives on protrusions on the rocks, on the ground, in buildings and in trees cavities. When placed on the rocks or on the ground, they look for a recess and use it, adding a little grass.
Derbnik with chicks
Air dances
Couples are formed one to two months before the egg. Derbniks demonstrate air tricks, including flights with wings and somersaults from side to side, which attract females and scare away other males. Both members of the couple take off and “circle” to designate their territory. “Obtaining flight” is when males fly slowly with short, small wings blows in a circle or eight near a sitting partner.
Derbniks put off 3-5 eggs. If the masonry dies at the beginning of the nesting season, the female makes a second masonry. Most of the 30-day incubation are performed by females. After the output of the eggs, mom continuously sits with chicks for 7 days. Когда молодняк достигают возраста, по меньшей мере, недели, матери остаются с ним только в ненастье.
For the entire period, the male provides food for chicks and partners. During incubation, males briefly incubate eggs, the female feeds nearby. After the conclusion, males cause females, do not return to the nest, females fly to get food for chicks from the partner. Chicks are leaning when they are from 25 to 35 days. Two weeks after they stand on the wing, young derbeniks catch insects on their own, even though they remain addicted to parents for about 5 weeks after plumage.
Features of derbenic feeding
Birds hunt, attacking prey from branches and in flight, use hills and other features of the landscape to secretly get to the victim. Derbniks do not attack from large heights. Hunting activity is observed early in the morning and closer to the evening.
Males stock up excess foods near the nest, and females eat when the male is late with prey. Derbniks feed on pigeons, small ducks, small and medium singing birds. In urban conditions, sparrows are the main derive diet. This species also hunts for insects, small mammals, reptiles, amphibians.
