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Cold weather events provoke egg ejection behaviour in open‐nesting passerines

Author:
Shitikov, Dmitry, Samsonov, Stanislav, Makarova, Tatiana
Source:
TheIbis 2019 v.161 no.2 pp. 441-446
ISSN:
0019-1019
Subject:
Passeriformes, brood parasitism, clutch size, eggs, nests, sanitation, spring, weather
Abstract:
We analysed 25 conspecific egg ejection events from a large sample of nests (n = 762) of three passerine species. In two species, most of the events could not be explained by intraspecific brood parasitism or nest sanitation behaviour. At least some of these cases were behavioural responses to unfavourable weather conditions in the spring of 2017. We conclude that clutch size adjustment through egg ejection may be more widespread among passerines than previously thought.
Agid:
6336562