On the California end I've noted the male Mockingbirds beginning to sing and
"dance" and the House finch male coloration has measurably darkened.
There's also been an increase in singing the last couple of days.

Peggi
Ben & Peggi Rodgers
Aptos, CA (near Santa Cruz)
USA
woodduck at cruzio.com

"A bird does not sing because it has an answer,
It sings because it has a song"