=Black-crowned Night Heron=: _Nycticorax nycticorax hoactli_ (Gmelin).--This is a locally common summer resident around marshes and riparian habitats. Characteristics of the occurrence of the species in time are given in Table 10. _Breeding schedule._--Eggs are laid in the period May 1 to August 10. _Number of eggs._--Clutch-size is about 4 eggs. Nests are placed at medium elevations in riparian trees, in Kansas chiefly cottonwood, or in beds of emergent marsh vegetation. =Yellow-crowned Night Heron=: _Nyctanassa violacea violacea_ (Linnaeus).--This is a local summer resident in riparian habitats, chiefly in southeastern Kansas. Specimens taken in the breeding season and records of nesting come from Meade, Stafford, Doniphan, Douglas, Greenwood, Woodson, Labette, and Cherokee counties. Characteristics of occurrence in time in Kansas are shown in Table 10. _Breeding schedule._--Eggs are laid in May and June. _Number of eggs._--Clutch-size is about 4 eggs. Nests are placed in riparian trees. =Least Bittern=: _Ixobrychus exilis exilis_ (Gmelin).--This is a local summer resident in marshland. Characteristics of its occurrence in time are indicated in Table 10. _Breeding schedule._--Eleven records of breeding span the period May 21 to July 20; the modal date of egg-laying seems to be in the first week of June. _Number of eggs._--Clutch-size is about 4 eggs. Nests are placed in dense emergent vegetation a few inches to a foot above the surface of the water. =American Bittern=: _Botaurus lentiginosus_ (Rackett).--This is a local summer resident in marshes and heavy grassland. The species occurs temporally according to characteristics as listed in Table 10. _Breeding schedule._--Eggs are laid in May and probably in June. _Number of eggs._--Clutch-size is 3 or 4 eggs. Nests are placed on the ground in heavy cover. =White-faced Ibis=: _Plegadis chihi_ (Vieillot).--This is a local summer resident in marshland; actual records of breeding come only from Barton County (Nossaman, 1952:7; Zuvanich, 1963; M. Schwilling, personal communication, July, 1962). The species has been recorded in the State from April 17 to October 6. _Breeding schedule._--Twenty-five breeding records are for June and early July. _Number of eggs._--Clutch-size is about 4 eggs (3.9, 3-4; 24). Nests are placed in emergent marsh vegetation near the surface of the water, in Barton County in extensive cattail beds harboring also Black-crowned Night Herons. =Mallard=: _Anas platyrhynchos platyrhynchos_ Linnaeus.--This is a local summer resident around marshes. The time of greatest abundance is October to April, but most birds move north for breeding. _Breeding schedule._--Fifteen records of breeding span the period April 1 to June 10; the modal date of egg-laying is in the first ten days of May. _Number of eggs._--Clutch-size varies widely; first clutches are of about 12 eggs. Brood sizes vary from 3 to 12 individuals in Kansas.