Saturday, 27 May 2017

[cobirds] MacGillivray's Warbler, Others - west Arapahoe Co

This morning, I spent an hour or so watching birds around my west Arapahoe Co. yard, near deKoevend Park in Centennial. It was a rather busy morning. I watched a female Black-headed Grosbeak attack my elm leaves. Last year, these leaves were filled with Elm Leafminer larvae (thanks to Dave Leatherman for confirming that). I haven't inspected them this year, but the leaves are brown-edged and, no doubt, filled with something. The grosbeak was only the latest to chomp away at the leaves. Black-capped Chickadees, House Sparrows, House Finches, Western Tanagers, and a Wilson's, MacGillivray's, & Yellow Warbler have all done the same.

A Swainson's Thrush, my first in the yard this year, also spent time in the elms. Later in the day, I had good looks of it foraging on the ground under my feeders.

I heard and spotted a singing Yellow Warbler. Perhaps this male is a pair with the female that has been around my yard this week. I also heard one or two singing Western Tanagers and a singing Bullock's Oriole.

A male MacGillivray's Warbler made a very brief visit in my yard, before flying east up my street into neighbors' yards. I believe I heard it singing, along with the Yellow Warbler, after it departed. This was my first sighting of a MacGillivray's Warbler in my yard since 5/23. This or another male MacGillivray's Warbler's first arrived in my yard this year on 5/8.

After taking in all the morning activity, I did a final walk around my yard and spotted an Olive-sided Flycatcher (a new yard bird), which made a brief visit to my neighborhood, flycatching from a high perch.

Still waiting on my first flyover of nighthawks for the year. And bats.

- Jared Del Rosso
Centennial, CO

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