And to study them you need a pair of good binoculars, Roger Tory Peterson's "Field Guide to the Birds", and the "Audubon Bird Guide (Eastern Land Birds)".
(you; need; a pair of good binoculars) (Guide; [is] Bird [of]; Audubon)
you Guide
need [is] Bird [of]
a pair of good binoculars
Audubon