North American fauna . gration.—Normal period: August 20-25 to September20-25; peak, August 25 to September 15. Extreme arrival dates:August 15,1953, in Anne Arundel County (Mrs. W. L. Henderson,Mrs. G. Tappan); August 17, 1945, in Prince Georges departure dates: October 13, 1919 (M. J. Pellew), andOctober 6, 1904 (W. W. Cooke), in the District of Columbia;October 5, 1954, in Prince Georges County (L. W. Oring). Maximum counts.—Spring: 10 along the C. and O. Canal,Montgomery County, on May 12, 1951 (P. A. DuMont); 10 atGreenbelt, Prince Georges County, on May 12, 1956 (L. W. 314
North American fauna . gration.—Normal period: August 20-25 to September20-25; peak, August 25 to September 15. Extreme arrival dates:August 15,1953, in Anne Arundel County (Mrs. W. L. Henderson,Mrs. G. Tappan); August 17, 1945, in Prince Georges departure dates: October 13, 1919 (M. J. Pellew), andOctober 6, 1904 (W. W. Cooke), in the District of Columbia;October 5, 1954, in Prince Georges County (L. W. Oring). Maximum counts.—Spring: 10 along the C. and O. Canal,Montgomery County, on May 12, 1951 (P. A. DuMont); 10 atGreenbelt, Prince Georges County, on May 12, 1956 (L. W. 314 NORTH AMERICAN FAUNA 62, FISH AND WILDLIFE SERVICE Oring) ; 9 at Patuxent Refuge on May 18, 1947. Fall: 10 atSeneca, Montgomery County, on September 12, 1954 (J. W. Ter-borgh).CANADA WARBLER Wilsonia canadensis (Linnaeus) Status.—Breeding (see fig. 59) : Common in the AlleghenyMountain section at elevations above 2,100 feet. Transient: Com-mon in all sections except the Eastern Shore section where it LEGENDBOTH SPECIESI Principal Range • Local Record ofROSE-BREASTED GROSBEAK Figure 59.—Breeding ranges of Canada Warbler and Rose-breasted Grosbeak. Habitat.—Breeding: Swamp and moist forests, in bogs andalong streams with understory of great laurel and other shrubs;also occurs in brushy cut-over oak-chestnut and northern hardwoodforests on the ridges. Transient: Flood-plain and swamp forests,and rich moist forests on the upland. Nesting season.—Probably late May to mid-July. Egg dates(2 nests) : May 28, 1935, in Allegany County (L. M. Llewellyn)and June 2, 1919, in Garrett County (J. M. Sommer). Kirkwood(1895) refers to a nest with young, found in Allegany County in1895, sometime later than June 10. Several observations havebeen made of adults carrying food in Garrett County, the earliestrecord occurring on June 11, 1918 (F. C. Kirkwood). Spring migration.—Nor?nal period: May 1-10 to May 25-June BIRDS OF MARYLAND AND DISTRICT OF COLUMBIA 315 1; peak,
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1880, booksubjectzoology
