_Podilymbus podiceps_ U _Butorides virescens_ U _Phalacrocorax auritus_ U _Florida caerulea_ U _Ardea herodias_ U _Casmerodius albus_ U _Leucophoyx thula_ U _Porzana carolina_ U _Nycticorax nycticorax_ U _Laterallus jamaicensis_ U _Nyctanassa violacea_ U _Gallinula chloropus_ U _Ixobrychus exilis_ U _Fulica americana_ U _Botaurus lentiginosis_ U _Charadrius alexandrinus_ U _Plegadis chihi_ U _Actitis macularia_ U _Branta canadensis_ U _Steganopus tricolor_ U _Anas platyrhynchos_ U _Sterna albifrons_ U _A. acuta_ U _Chlidonias niger_ U _A. discors_ U _Telmatodytes palustris_ N _A. clypeata_ U _Cistothorus platensis_ N _Aix sponsa_ U _Geothlypis trichas_ N _Aythya americana_ U _Xanthocephalus xanthocephalus_ N _Oxyura jamaicensis_ U _Agelaius phoeniceus_ N _Rallus elegans_ U _Rallus limicola_ U Grassland Species Xeric Scrub Species _Buteo swainsonii_ N _Callipepla squamata_ N _B. regalis_ U _Geococcyx californianus_ N _Circus cyaneus_ O _Salpinctes obsoletus_ N _Tympanuchus cupido_ N _T. pallidicinctus_ N _Pedioecetes phasianellus_ N Unanalyzed Species _Charadrius vociferus_ U _Eupoda montana_ U _Cathartes aura_ N _Numenius americanus_ U _Coragyps atratus_ N _Bartramia longicauda_ U _Falco peregrinus_ U _Speotyto cunicularia_ U _Columba livia_ O _Asio flammeus_ U _Tyto alba_ U _Sayornis saya_ S _Chordeiles minor_ U _Eremophila alpestris_ O _Megaceryle alcyon_ U _Dolichonyx oryzivorus_ N _Riparia riparia_ O _Sturnella magna_ N _Stelgidopteryx ruficollis_ N _S. neglecta_ N _Hirundo rustica_ O _Spiza americana_ N _Petrochelidon pyrrhonota_ U _Calamospiza melanocorys_ N _Ammodramus savannarum_ N _Passerherbulus henslowii_ N _Aimophila cassinii_ N _Spizella pusilla_ N [A] The letter following each name refers to presumed zoogeographic derivation of the species, modified after Mayr (1946). N = North American evolutionary stock; S = South American stock; O = Eurasian stock; U = unanalyzed. Avian Habitats in Kansas Four major habitat-types can be seen in looking at the distribution of the breeding avifauna of Kansas. These are woodland, grassland, limnic, and xeric scrub plant formations. A little more than half the breeding birds of Kansas live in woodland habitats, about one-fifth in limnic habitats, about one-eighth in grassland habitats, and less than two per cent in scrub habitats; this leaves some 6.4 per cent of the breeding avifauna unanalyzed (Table 2).