Purple Martins are generally known to raise only a single brood.

There is a single brood produced per year.

There is a single brood which flies early June to late August.

Young from a single brood have been found with multiple paternity.

The long juvenile dependency period means only a single brood per pair is typically raised each breeding season.

Its flight time is from April to June in a single brood.

Flight period is from December to May, with a single brood.

This butterfly is on the wing from late spring to mid-summer with a single brood.

There is a single brood per year in June and July.

Their flight period is between December and February with a single brood.