Page:Bird-Life A Guide to the Study of Our Common Birds. Teachers Manual.djvu/16

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Plate IV.
Page 86,88.

.

HERRING GULL.

Length, 24-.0 inches. Adult, back and wings pearl-gray; end of primaries marked with black; rest of plumage white. Young, dark grayish, primaries and tail brownish black.

PETRELS.

Length, 7.50 inches. Black, upper tail-coverts white.

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