Summer covers the period when summer-only migrant species breed, in braod terms May-early Sep.
Breeding activity for each typically commences a few days to a few weeks after their first migrant wave arrives and continues until the young are largely independent, about two to three weeks before their first migrant wave departs (see Migrants, below). Species which are resident for periods in the summer but do not breed are identified as ‘Non Breeder’ at the start of their species account.