Peterson Field Guide to Hawks of North America (Peterson by William S. Clark, Brian K. Wheeler

By William S. Clark, Brian K. Wheeler

This consultant contains all 39 species of North American hawks and different diurnal raptors, together with eagles, falcons and vultures. color work and pictures convey every one species in quite a few color morphs and plumages, that are are defined intimately.

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Extra resources for Peterson Field Guide to Hawks of North America (Peterson Field Guides (R) Series)

Sample text

Some juveniles onl" 5hO\\ faint rufous markings on hreast. Tail as in light-morph jU\i~nile. [k] JUVENILE, DARK MORPH. Body and coverts are dark brown. Flight fcath ers and tail arc same as those of light-morph juveniles. Some dark juveniles show rufous streaking on underparts . [I] JUVENltE. Juveniles appear dark hrown on uppersid es, with faint pal,· markings on uppcrwing coverts. This variant shows an accipiter like tail patte rn. \Vingtips of gliding hawks arc noticeably point",1. [m] JUVENILE, LIGHT MORPH.

I] INTIRMEDIATI (RUfOUSI JUVENIII. juven il es witb mod e rate markings on underparls will most like ly beco me rufou s- morph aclults. Pall' seapulars form a V on bac ks of perched ju ve nil es. [g) LIGHT INTERMEDIATE JUVENilE. Typical ju ve nil e with some dark marking~ on underparts and two dark pa tc hes on s ides of upper breast. [h) INTERMIDIATE-MORPH JUVINILE. Juvc niles with moderatc markings on un de rparts and und e rwin g coverts will l1lost likel y become rufous l1lorph adults. \I\lingtips appear very poinled on gliding birds .

Rayis/l IIwrblill,~ (m wing alld ,ail. ~ tll. [e] SUBADULT. Some olhcm·jsc adull-appearing eagles (Basil' III or IV) show a bil or whitl' in lheir laik [d] BASIC I. Similar lo juvenile. 'calhers, n ew tel fresh le rliaJs, a nd gra)'ish IIWr/J/il1g Orl cellirall ail f ealhers . ~S, ragged border betwecn while

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