Date: 10/3/17 7:55 am
From: john flannigan <rublzrme...>
Subject: Empidonax ID
Kenn Kaufman has a book in the Peterson Field Guide series: A Field Guide To Advanced Birding: Birding Challenges and how to Approach them. 1990. Has chapter on Empidonax flycatchers. Goes into detailed analysis of points you raised.

Enjoy your birding,

John Flannigan

Allegheny county
 
Join us on Facebook!