Number of eggs.—Clutch-size is 4 eggs.
Nests are hung about 24 feet high (ranging from nine to 70 feet) in elm, cottonwood, sycamore, maple, and oak.
Bullock Oriole: Icterus bullockii (Swainson).—This summer resident is common in western Kansas in woodland and riparian situations. The species hybridizes freely with the Baltimore Oriole, and most Bullock Orioles in Kansas show evidence of such interbreeding. Almost all records of breeding come from west of the 100th meridian, but the species in recognizable form probably breeds locally at least as far east as Stafford County.
Breeding schedule.—Few nesting records are available, but these suggest that the breeding schedule of the Bullock Oriole resembles those of the preceding two species in Kansas.
Number of eggs.—Clutch-size is about 4 eggs.
Nests are hung about 26 feet high (ranging from 10 to 50 feet) in cottonwood, elm, and other large trees.
Common Grackle: Quiscalus quiscula versicolor Vieillot.—This summer resident is common in parkland, and around towns and farms. Most individuals move out of Kansas in winter, and the temporal occurrence of these birds is indicated in [Table 18].
Breeding schedule.—The 233 records of breeding span the period April 11 to June 30 ([Fig. 8]); the modal date for egg-laying is May 5, and two-thirds of all eggs are laid between May 1 and May 20.
Number of eggs.—Clutch-size is 5 eggs (4.5, 3-6; 33). Clutches laid at the peak of the season average 4.7 eggs (3-6; 21), and those laid as replacement clutches average 4.3 eggs (3-6; 12).
Nests are placed in forks and crotches about 22 feet high (ranging from six to 50 feet) in elm, red cedar, cottonwood, oak, box elder, and pine.