According to the phenological calendar, spring begins with thawed patches of white snow and the blooming of gray alder, ends at the time of flowering of fruit trees and the fall of elm fruits. The average period of spring is about 85 days (approximately from March 18 to June 10).
In the spring, birds return from the southern countries. People say: "The swallow begins spring, and the nightingale ends."

According to the Bianchi Forest Calendar, spring is the time of the mass arrival of birds to their native nesting sites. The first to arrive are the birds that flew away last, and the last to fly away first: rooks, starlings, larks, finches, wagtails, gulls, lapwings, magpies, cranes, redstarts, thrushes, buntings, wild geese, ducks, kites, snipe-waders, nightingales, swallows, swifts, robins, cuckoos, etc.
The last to arrive are birds with bright plumage - kingfishers, bluethroats, chasers, warblers, robins and others. Orioles are the last to arrive, already when the trees are covered with bright young foliage.
In March-April, hares, ptarmigan, weasel molt.
A hare has offspring - nastoviki, i.e. peers of Nast; badger cubs; moose - grew. Usually two red calves are born - a bull and a heifer.
At the same time, amphibians reproduce.
End of February - March - weddings for wolves and foxes.
People say about spring:
Spring is red with flowers, and autumn with pies.
In the spring you will miss an hour, you will not catch up during the day.
Spring is like a girl: you don't know when she will cry, when she will laugh.
Spring time - ate yes from the yard. Spring day - what an affectionate word.
Water in the meadow - hay in a stack.
If you miss a day in spring, you won't get it back in a year.
It melts early - it won't melt for a long time.
Early spring is a sign that there will be many bad days in summer.
When the spring water goes, and the ice holds, then this is a bad year.
If in spring the snow melts quickly, and the water runs together - to a wet summer.
In the spring, both mud and bread will give.
A migratory bird flows in flocks - towards a friendly spring.
Birds build their nests on the sunny side - by the cold summer.