One of the most popular migratory birds is swallow. even as it is supposed that because of them people understand this phenomenon. Towards the end of the eighteenth century it was discovered that swallows spend the winter in places that enjoy more heat and not hidden as initially thought.
The journey of each year, swallow travels distances of up to 10,000 km. Very fragile, not all are from a trip so long and no way back, they returned each time not only in the same place they left but even the same nest.
The reason for leaving the country is looking for food, and not only flying insects are not found on our long winter until the spring when they return.
Swallows are small birds, not exceeding 20 cm. Copy is the most common swallow that has the head and back of a black-blue, white breasted redhead goiter. The tail is finished with two longer feathers arranged in the shape of a V.
Insect food is represented generally gathered in flight, swallows can fly up to 160km/ora. Nest and make it as close to as little as forested areas, highly populated by insects, and as close as possible to have water handy food source but wet earth which he uses to build the nest. Nests are generally made from eaves of houses, from small stones and earth, then lining it with straw or down. Swallow build a nest in one week.
Swallow eggs which make up 6 out chicks. At first, to learn to fly themselves and buy their food, they are fed small insects. It is assumed that feeding chickens, one swallow make hundreds of flights each day.