Orange-crowns arrive (at least on the north coast a full moth earlier than
Wilson's Warbler. It is not unusual for me to capture fledged HY OCWA by
the first week in June. My best hypothesis is that Orange-crowns finish
nesting earlier, so they shut up earlier.
They were, however still singing and defending territory at my banding
station as of June 5 of this year...

>
>I've been puzzled by the fact that OC Warblers are singing everywhere
>around here in mid to late April, but are scarcely to be heard by mid
>July. Now, perhaps this is because most are just migrating through, but
>if so they are rather uncommon nesters. Alternatively, perhaps they just
>get real quiet as they settle into nesting. Wilson's Warblers, by
>contrast, seem to keep singing well into June. Does anyone have a theory?
>
>Gene Hunn (hunn at u.washington.edu)
>
>

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Mike Patterson, Astoria, OR
mpatters at ednet1.osl.or.gov
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