It's always useful catching juvenile birds; taking note of the primary covert pattern (on the treecreeper) and the alula pattern (on the Goldcrest) can help with ageing these species after they've completed their partial post-juvenile moult.
Thursday, June 14, 2012
Woolston
I joined Dave Riley at Woolston for a few hours of early morning ringing. The site is very quiet — hardly any warblers around — but we caught a few bits and pieces including several juveniles of a few species. Amongst them were this juvenile Common Treecreeper and this juvenile Goldcrest.
It's always useful catching juvenile birds; taking note of the primary covert pattern (on the treecreeper) and the alula pattern (on the Goldcrest) can help with ageing these species after they've completed their partial post-juvenile moult.
It's always useful catching juvenile birds; taking note of the primary covert pattern (on the treecreeper) and the alula pattern (on the Goldcrest) can help with ageing these species after they've completed their partial post-juvenile moult.
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