_Breeding schedule._--The breeding season spans the period May 11 to June 20 (Fig. 6); the modal date of egg-laying is June 5, and 57 per cent of all clutches are laid in the period June 1 to 10. _Number of eggs._--Clutch-size is 5 eggs (4.2, 3-6; 33). Mean clutch-size is 4.3 eggs in May and 4.2 in June. Adults tend to lay clutches of 5 eggs and first-year birds clutches of 4. Replacement clutches by birds of any age tend to be of 3 eggs. Nests are built of sticks and mud placed in cavities; in Kansas these are almost always in colony houses erected by man. Use of holes and crevices in old buildings is known to have occurred on the campus of The University of Kansas in the nineteen thirties (W. S. Long, 1936, MS), in Oberlin, Decatur County in 1908-1914 (Wolfe, _loc. cit._), and presently in Ottawa, Franklin County (Hardy, 1961). =Blue Jay=: _Cyanocitta cristata bromia_ Oberholser.--This resident is common throughout Kansas in woodland habitats. Most first-year birds move south in winter, but adults tend to be strictly permanent residents. Groups of ten to more than 50 individuals can be seen moving south in October and north in April. All individuals taken from such mobile groups are in first-year feather. _Breeding schedule._--Eighty-three records of breeding span the period April 10 to July 10 (Fig. 7); the modal date of egg-laying is May 15, and about 50 per cent of all clutches are laid in the period May 11-31. _Number of eggs._--Clutch-size is 4 eggs (4.1, 3-6; 15). Nests are placed from eight to 70 feet high (averaging 24 feet) in forks, crotches, and on horizontal limbs of elm, maple, osage orange, cottonwood, and ash. =Black-billed Magpie=: _Pica pica hudsonia_ (Sabine).--This resident is common in western Kansas, along riparian groves and woodland edge. Records of nesting are from as far east as Clay County. Wolfe (1961) outlines the history of magpies in Decatur County as follows: the species was purported to have appeared in rural districts near Oberlin in 1918, but Wolfe saw the birds only by 1921, at which time he also found the first (used) nests. The first reported occupied nest was one in Hamilton County in 1925 (Linsdale, 1926). Earlier records, chiefly of occurrence in winter, can be found in Goss (1891). _Breeding schedule._--Fourteen records of breeding span the period April 11 to June 20; the modal date for egg-laying is May 15. _Number of eggs._--There are no data on clutch-size in Kansas; elsewhere Black-billed Magpies lay 3 to 9 eggs, and clutches of 7 are found most frequently (Linsdale, 1937:104). Nests are placed from 10 to 18 feet high (averaging 13 feet) in forks or lateral masses of branches in cottonwood, box elder, ash, and willow.