It appears that Chiffchaffs have differential migratory patterns in males and females. We might use this article to do some academic reading.
http://repositorio.ispa.pt/bitstream/10400.12/1449/1/JAB%2036%20184-190.pdf
Fascinating!
Thursday, 18 April 2013
They (and We) are on their way!
Many of the birds that we see and hear during the "British" summer time are infact migrants. This wonderful set of data from the BTO, set us up for some birding excitement.
http://btomigrationblog.blogspot.co.uk/2013/04/summer-migrants-set-to-arrive-in-force.htm
http://btomigrationblog.blogspot.co.uk/2013/04/summer-migrants-set-to-arrive-in-force.htm
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