crested head_; sits erect watching for
fish and flies near the surface of the water, uttering a _rattling_ call;
summers in Lincoln Park.

23. YELLOW-BELLIED SAPSUCKER. 8-1/4 in.
(Sphyrapicus varius. 402.)

Mixed black and white; _yellowish-white underneath_; streaked on sides;
white bar _lengthwise_ the wing; scarlet patch, bordered with black on
crown _and throat_ (female with throat white); harsh, squealing note.
*Downy Woodpecker. *Hairy Woodpecker.

24. RUSTY BLACKBIRD. 9-1/2 in.
(Scolecophagus carolinus. 509.)

Black, uniformly iridescent and more or less rusty; tail almost even;
female smaller and rustier with pale line over eye. *Bronzed Grackle.
*Red-winged Blackbird.

25. FIELD SPARROW. 5-3/4 in.
(Spizella pusilla. 563.)

Streaked; crown and _bill_ reddish-brown; neck ashy; brownish-white
_unspotted_ breast; two indistinct white wing bars; song, "fe-u, fe-u,
fu, fee, fee, fee," beginning slowly and ending almost in a trill.
*Chipping Sparrow. *Tree Sparrow.

26. HERMIT THRUSH. 7-1/4 in.
(Hylocichla guttata pallasii. 759b.)

Olive-brown; _tail reddish-brown_; below dull white tinged with buff and
thickly spotted across the breast; shy, hiding in bushes; famous for its
song but silent during migration. *Other Thrushes.

27. RED-WINGED BLACKBIRD. 9-1/4 in.
(Agelaius phoeniceus. 498.)

Black; scarlet shoulder-straps edged with yellow; female much streaked,
marked with rusty; likes marshy places; note, "quonk-a-ree'." *Cowbird.
*Rusty Blackbird.

28. RUBY-CROWNED KINGLET. 4-1/4 in.
(Regulus calendula. 749.)

Dark greenish-olive; light underneath; ring about eye and wing-bars
white; male shows at will a brilliant ruby crown-patch; remarkable song.
*Golden-crowned Kinglet. *Warblers.

29. HAIRY WOODPECKER. 9 in.
(Dryobates villosus. 393.)

White band down the middle of black back; wings black spotted with white;
beneath white; outer tail-feathers white _not barred_; red band on neck
of male; large bill; note, sharp resonant "plick." *Downy Woodpecker.
*Yellow-bellied Sapsucker.

30. TREE SWALLOW. 6-1/4 in.
(Iridoprocne bicolor. 614.)

Metallic blue-g