The annual cycle of life and seasonal phenomena in the life of birds.

Annual life cycle and seasonal phenomena in the life of birds:
1) Spring – breeding season:
– mating behavior (pairing and mating);
– nest construction;
– laying and incubating eggs;
– feeding chicks and teaching them to fly;
2) Preparation for winter and wintering
a) sedentary birds – actively accumulate nutrients, molt;
b) nomadic – move short distances in search of food;
c) migratory – migrate to warm regions, where they overwinter, because there they find food for themselves.