Second brood
The second brood is an ornithological term and describes a second brood of a female bird in a year. Whether there is a second brood depends on the weather , food availability , competitive pressure or similar factors.
The spectrum of bird species in which second broods have been observed or identified is very broad. In passerine birds as well as non- sparrow birds, many species start a second brood when the conditions are right. Typical representatives are for example reed warbler , thrushes , titmice and sparrows, but also with storks , ducks and birds of prey , second broods are not uncommon.
Even with pronounced long-distance migrants such as the swifts second broods observed again and again.
The choice of partner for the second brood varies greatly from species to species. Monogamous species occur as well as polygamous species , so that the same males are either involved in the second brood or other males are preferred.
The so-called box brood is also a special form of second brood.
See also
Web links
Excerpt from Vogelwelt 125 (2004), pages 113-115. Second brood in swifts (PDF; 243 kB)