This picture will be of interest to people discussing low numbers of juvenile Black-tailed Godwits in UK, such as @FrodshamBirder @Vaasetter @ed_keeble @Harrier1234 @RichardduFeu.
Short thread follows. https://twitter.com/Iceland_Review/status/1303680350573473792
I shared this blog about how number of juveniles is influenced by spring temperatures. These data are from south #Iceland. Breeding here was OK in 2020 - 2017 was mega:
https://wadertales.wordpress.com/2016/12/20/black-tailed-godwits-and-volcanic-eruptions/
#waders #orhithology #shorebirds
South Iceland is relatively warm. Black-tailed Godwits have spread into other areas of Iceland over last 120 years. How do we know this?
https://wadertales.wordpress.com/2015/12/18/black-tailed-godwits-expand-their-range-in-russia-and-iceland/
#waders #shorebirds #ornithology
This blog discusses the link between population growth and spring temperatures:
https://wadertales.wordpress.com/2019/02/15/from-local-warming-to-range-expansion/
#waders #shorebirds #ornithology
Cold spring in North and East Iceland (see start of thread) may well have reduced Black-tailed Godwits productivity this year? Perhaps, however, adults in these areas were able to hang on and breed later, in which case, there could still be more juveniles to come?
You can follow @GrahamFAppleton.
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