Wilson’s Warbler

Wilsonia pusilla

(L 4.75" WS 7" Wt 0.27 oz)

Only migrant warbler found in
tropical high plains...numbers
declining in west U.S.

Alexander Wilson

Birds are both works of art
and marvels of engineering.

   (Patrick Merrell)

Magic Hedge

Chicago Lakefront

14May2010

Note distinctive
black cap and yel-
low underside.

Columbus Park

Chicago

10May2011