Number of eggs.—Clutch-size is 2 eggs.
Eggs are laid on the ground, with or without plant cover.
Table 12.—Occurrence in Time of Summer Resident Caprimulgids and Apodids in Kansas
| Species | Arrival | Departure | ||
| Range | Median | Range | Median | |
| Chuck-will's-widow | Apr. 20-May 1 | Apr. 28 | Oct.-Dec. | Oct. ? |
| Whip-poor-will | Apr. 6-Apr. 25 | Apr. 17 | Sept. 10-Oct. 11 | Sept. 21 |
| Poor-will | Apr. 12 | ........ | Sept. 20 | ........ |
| Common Nighthawk | Apr. 29-May 23 | May 15 | Sept. 13-Oct. 18 | Sept. 23 |
| Chimney Swift | Apr. 2-Apr. 30 | Apr. 22 | Sept. 18-Oct. 30 | Oct. 4 |
| Ruby-throated Hummingbird | Apr. 2-May 19 | May 6 | Sept. 3-Oct. 15 | Sept. 10 |
Common Nighthawk: Chordeiles minor (Forster).—This is a common summer resident throughout Kansas. Temporal occurrence is indicated in [Table 11]. Three subspecies reach their distributional limits in the State, C. m. minor (Forster) in northeastern Kansas, C. m. chapmani Coues in southeastern Kansas, and C. m. howelli Oberholser west of the Flint Hills.
Breeding schedule.—Twenty-two records of breeding span the period May 11 to June 30; the modal date for egg-laying is June 10 ([Fig. 5]).
Number of eggs.—Clutch-size is 2 eggs.
Eggs are laid on the ground in rocky or gravelly areas, on unpaved roads, or on flat, gravelled tops of buildings of man.
Chimney Swift: Chaetura pelagica (Linnaeus).—This is a common summer resident in eastern Kansas, around towns. Temporal occurrence in the State is indicated in [Table 12].
Breeding schedule.—Thirty-six records of breeding span the period May 11 to June 30; the modal date for egg-laying is May 25 ([Fig. 5]).