Breeding schedule.—The 116 records of breeding span the period April 11 to July 31 ([Fig. 7]); the modal date of laying is May 20. About 45 per cent of all clutches are laid in the period May 11 to 31.
Number of eggs.—Clutch-size is 7 eggs (5.8, 3-7; 20). Clutches laid in May average 6.1 eggs (4-7; 14); those laid in June and July average 5.0 eggs (3-7; 6).
Nests are placed in cavities about ten feet high (ranging from two to 50 feet) in cottonwood, elm, willow, and a wide variety of structures, mostly nestboxes, built by man.
Bewick Wren: Thryomanes bewickii Audubon.—This wren is an uncommon resident in Kansas, except for the northeastern quarter, in woodland understory and brushland. T. b. bewickii Audubon occurs north and east of stations in Riley, Pottawatomie, Douglas, and Linn counties, and T. b. cryptus Oberholser is found south of stations in Greeley, Stafford, and Linn counties; a zone of intergradation occurs between the two named populations. The species occupies marginal habitat in most of Kansas and periodically is reduced in numbers by severe winters.
Breeding schedule.—Twenty-two records of breeding span the period March 21 to July 10 ([Fig. 7]); the modal date for first clutches is April 15 and for second clutches June 15.
Number of eggs.—Clutch-size is 5 eggs (5.5, 5-7; 12).
Nests are placed in crevices about five feet high (ranging from zero to nine feet) in trees (oak, cherry, and pear), boulders, and a wide variety of structures, some of them nestboxes, built by man; appropriation and modification of nests of Barn Swallows is known to occur.
Carolina Wren: Thryothorus ludovicianus ludovicianus Latham.—This common resident of southeastern Kansas in woodland understory and brushland is uncommon in the northeastern and south-central sectors. Stations of breeding all fall east of a line running through Doniphan, Riley, and western Reno counties. North and west of southeastern Kansas the Carolina Wren is in marginal habitat and periodically is reduced in numbers by severe winters.
Breeding schedule.—Fourteen records of breeding span the period April 11 to August 10; the modal date for laying is April 15, to judge only from the present sample. The species probably breeds also in late March and early April.
Number of eggs.—Clutch-size is 4 eggs (4.2, 3-8; 9).