Number of eggs.—Clutch-size is about 4 eggs.
Nests are low (some as high as six feet) in woody vegetation.
American Redstart: Setophaga ruticilla ruticilla (Linnaeus).—This summer resident occurs locally in woodlands east from stations in Cloud and Sumner Counties. Temporal occurrence is indicated in [Table 17].
Breeding schedule.—Eggs are laid in May and June.
Number of eggs.—Clutch-size is about 4 eggs (Davie, 1898), but there are two records of 5 in Kansas. Nests are placed six to 30 feet high, but usually about 12 feet, in forks or saddled on a branch, in deciduous trees.
Fig. 8.—Histograms representing breeding schedules of wood warblers, the House Sparrow, icterids, and cardinal grosbeaks in Kansas. See legend to Figure 1 for explanation of histograms.
House Sparrow: Passer domesticus (Linnaeus).—This sparrow, introduced from stocks in Ohio and New York (originally from England and Germany), has been present since about 1876 in eastern Kansas; it is a common resident in towns and at farmsteads throughout the state.
Nomenclaturally, House Sparrows in North America consistently have been referred to the European ancestral stocks, P. d. domesticus, but none in North America today duplicates morphologically the European birds. This is evidence of meaningful adaptation of the North American populations to environments in which they now live, and continued use of P. d. domesticus is misleading. Studies on local differentiation in North American House Sparrows are in progress, and when the biology of sparrows in the midwest is better understood, suitable nomenclatural proposals will be made.
Breeding schedule.—Fifty-one records of breeding span the period March 20 to July 20 ([Fig. 8]); the modal date for laying of first clutches is April 5, and for second clutches May 5.