How diverse are Song Sparrow songs?
Recently I heard one sing a classic song, then end in three trilling notes;
on the way back from lunch today I heard one sing two opening notes like a
Vesper, then continue as normal. Do they learn from other sparrows near
their territory? Do juveniles struggle with their initial songs? Is
hybridization an issue?
(Hard to admit I know so little about a common songster - although am
comforted by Kenn Kaufman's admission a number of years back that he
couldn't adequately describe a BC Chickadee to his own satisfaction.)
Good birding to all!
Al Schirmacher
Princeton, MN
Mille Lacs & Sherburne Counties
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