Related Experiment Video
Updated: Jul 17, 2026

Incremental Temperature Changes for Maximal Breeding and Spawning in Astyanax mexicanus
Published on: February 14, 2021
Is earlier spring migration of Tatarstan warblers expected under climate warming?
Oleg V Askeyev1, Tim H Sparks, Igor V Askeyev
1The Institute of Natural Systems Ecology, Tatarstan Academy of Sciences, Kazan, Russia.
Abstract:
We analysed data on the arrival dates of four species of leaf warbler (genus Phylloscopus) collected in Tatarstan between 1957 and 2004. There was no evidence over the whole period that the warblers returned to their breeding sites significantly earlier, mainly because local temperatures for April and May, months when the majority of birds arrived from their wintering grounds, did not increase significantly. However, arrival dates of two species (Chiffchaff P. collybita and Willow warbler P.trochilus) were strongly related to local temperature in April, and that of Greenish warbler P. trochiloides to that in May. As expected, arrival dates for the three species wintering in Africa (Chiffchaff, Willow and Wood warblers P. sibilatrix) correlated positively with one another (P < 0.01 in all cases), but were not correlated with arrival dates of Greenish warbler (P > 0.5 in all cases), a species wintering in the Indian sub-continent.
Related Concept Videos
Migration
Global Climate Change
Conservation of Declining Populations
Responses to Heat and Cold Stress
Derivatives: Problem Solving
Threats to Biodiversity

