North American fauna . ont sections; fairly common locallyin the Eastern Shore and Western Shore sections (most numerousin the swamp along the Pocomoke River and its tributaries, andin the Greensand District of east-central Prince Georges County—see Harper, 1918; rare and irregular elsewhere) ; uncommon inthe Ridge and Valley section; rare or absent in the Upper Chesa-peake section. Transient and wintering: Usually fairly commonin all sections, but varying considerably in abundance from yearto year. Habitat.—Flood-plain and swamp forests; and moist deciduousforest types on the upland. Nesting
North American fauna . ont sections; fairly common locallyin the Eastern Shore and Western Shore sections (most numerousin the swamp along the Pocomoke River and its tributaries, andin the Greensand District of east-central Prince Georges County—see Harper, 1918; rare and irregular elsewhere) ; uncommon inthe Ridge and Valley section; rare or absent in the Upper Chesa-peake section. Transient and wintering: Usually fairly commonin all sections, but varying considerably in abundance from yearto year. Habitat.—Flood-plain and swamp forests; and moist deciduousforest types on the upland. Nesting season.—Late March to mid-July (nesting peak, mid-April to late May). Nest-building was recorded as early asMarch 31, 1894, in Baltimore County (P. T. Blogg). Extremeegg dates (11 nests) : April 7, 1894, in Baltimore County (P. ) and May 17, 1881, in Washington County (Small, 1881b).Extreme nestling dates (11 nests) : April 30, 1948, in the Districtof Columbia (T. W. Donnelly) and June 10, 1956, in Garrett. LEGEND j| ii 1U Principal Range• Local Record Figure 39.—Breeding range of White-breasted Nuthatch. 11% NORTH AMERICAN FAUNA 62, FISH AND WILDLIFE SERVICE County (G. Knight). Nest-building was recorded as late asJune 1, 1935, in Allegany County (L. M. Llewellyn). Kirkwood(1895) recorded young just out of the nest as late as July 26,1894. Spring migration.—Normal period: February 25-March 5 toApril 25-May 5; peak, March 5 to April 10. Fall migration.—Normal period: September 15-25 to No-vember 1-10; peak, October 10 to November 1. As early as thefirst week in July there frequently is a light movement of White-breasted Nuthatches into areas that are within 5 or 10 miles ofits nesting range. Breeding population densities (pairs per 100 acres).— 6 (2 in 36 acres) in virgin central hardwood forest (white oak-tulip-poplar)in Prince Georges County in 1947 (Stewart and Robbins, 1947b). 6 (5 in 80 acres) in central hardwood forest (oaks-tulip-poplar) with scat-
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1880, booksubjectzoology
