[Tweeters] single sex (and juvenile) flock of Purple Finches - typical?

Hal Michael ucd880 at comcast.net
Sun Oct 13 09:08:58 PDT 2013

While I don't know about single -sex flocks (not looking closely enough) I do find that my banding tends to be single sex for Juncos.  males one day and females the next.  Not always 100% one or the other but the vast majority.

Hal Michael
Olympia WA
360-459-4005 (H)
360-791-7702 (C)
ucd880 at comcast.net

----- Original Message -----
From: "Stewart Wechsler " < ecostewart @ gmail .com>
To: tweeters at u. washington . edu
Sent: Sunday, October 13, 2013 7:39:36 AM
Subject: [Tweeters] single sex (and juvenile) flock of Purple Finches -        typical?

I was noting a flock of maybe 8 Purple Finches at Lincoln Park (Seattle), perching on more stable branches and jumping up to eat the berries of Pink Honeysuckle - Lonicera hispidula (the flexible honeysuckle vines wouldn't have held their weight well) .  All were either female or juvenile.  I was hoping to show a couple of friends with me a male.  Does anyone know if such single sex groups at this time of year are common?

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