Number of eggs.—Clutch-size is 4 eggs (3.9, 3-7; 13).
Nests are placed in niches of various sorts seven to 50 feet high in buildings, nestboxes, and trees, or freely situated in forks and crotches of large trees.
Bobolink: Dolichonyx oryzivorus (Linnaeus).—This species is a rare and local summer resident, in and about grassy meadows. There are but two stations of breeding in Kansas: Jamestown State Lake, Cloud County, and Big Salt Marsh, Stafford County. Temporal occurrence is indicated in [Table 18].
Breeding schedule.—Eggs are laid in June.
Number of eggs.—Clutch-size is about 5 eggs.
Nests are placed on the ground amidst grasses.
Eastern Meadowlark: Sturnella magna (Linnaeus).—This summer resident and resident is common in eastern Kansas, in moist grassland. S. m. argutula Bangs occurs in Montgomery, Labette, and Cherokee counties and intergrades to the north and west with S. m. magna (Linnaeus). Good numbers of birds are found east of the Flint Hills, but to the west the species is of restricted and local distribution. Extreme outliers of the species are found no farther west than stations in Jewell, Stafford, and Barber counties.
Breeding schedule.—Forty records of breeding span the period April 10 to July 20 ([Fig. 8]); the modal date for egg-laying is May 5. Fifty-seven per cent of all eggs are laid in the period May 1 to 20.
Number of eggs.—Clutch-size is 5 eggs (5.2, 4-7; 26). Prior to May 11, clutch-size is 5.3 eggs (13 records), and after that date it is 5.1 eggs (13 records).
Nests are placed on the ground, with cover of grasses or forbs.