Falcons often keep the same shelter for several years but, as the nest is very basic, they can also change from one year to the next while remaining (normally) within the same territory. For this reason, it is assumed that Peregrines live in stable pairs over the long term. In spring, the male courts the female by performing aerial acrobatics. Pairs of falcons can be seen spiralling, soaring and swooping. The breeding season depends on latitude and climate. Egg-laying takes place in February and March in the north of the temperate zone, and from April to May in colder, more northerly areas.
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