Swallows - air is tireless hunters of insects.They can not be confused with anyone else, because they have distinctive features: blue-black "tailcoat" light breast and a forked tail.Flight speed - 60 km / h, but the trajectory is very changeable and unpredictable.A large number of these elegant birds can be seen near the grazing herds, which hover around mosquitoes, gnats, horseflies.These insects form the basis of the diet of adults and chicks.To nest swallows selected vertical surfaces: in the wild - the rock cliffs of the rivers, in the settlements - eaves, roofs, etc.Building material for their homes they gather on the banks of species vodoemov.Areal family lastochkovyh large enough.They do not only occur in areas of the Far North.Time of arrival of swallows nesting depends on the geographical location
of the region: in the southern areas they appear in April, and in the northern and middle latitudes - in May.In winter, these birds fly among the first in August and September.As a rule, they move in large flocks during daylight hours, although there are isklyucheniya.Neskolko centuries ago suggested that swallows spend the winter at the bottom of reservoirs, buried in the mud, and in spring are chosen on the surface.This misconception has developed due to the fact that during the flight stops large number of birds in the night in coastal thickets.Thanks ringing were tracked main migration routes of swallows.In addition, using this method, scientists were able to establish the exact wintering certain populations.For example, species that nest in Eastern Europe, are directed to the south and east of South Africa, and especially in central and western Europe are flying to Thailand, Southeast Asia, countries in Africa, sub-Saharan Africa (Liberia, Congo and others). Swallows perform the longest flights in birds passerine - 9-12 thousand kilometers.This distance they overcome for 2-3 months.Record for long-distance flights are sea swallows - Stern, flying each year about 40 000 km.