common
White-breasted Nuthatch
The head-first tree walker — blue-gray back, black cap, and the nasal "yank-yank" from bark.
Core Biological & Field Specifications
ID marks
Blue-gray back, black cap, white face, walks head-first down
Size
5.5–6 in
Song
Nasal "yank-yank" — a horn toot
Feeder
Sunflower, peanuts, suet — one seed cached per trip