Using Mayr's (1946) breakdown of geographical origin of the North American bird fauna, about 53 per cent of the woodland passerine birds in Kansas are of "North American" origin, 22 per cent are of "Eurasian" origin, and 14 per cent are of "South American" origin ([Table 3]). These figures for Kansas are commensurate with those found for other geographic districts at the same latitude in North America (Mayr, 1946:28). Other characteristics of woodland birds are summarized in tables [4] and [5].
Table 3.—Analysis of Ecologic Groups of Birds by Status of Residency and Area of Origin
| Migrant | Resident | Pt. Migr. | Old World | N. Amer. | S. Amer. | Unanalyzed | |
| Woodland species, | 60% | 29% | 11% | 22% | 53% | 14% | 11% |
| 101:58% | |||||||
| Limnic species, | 94% | 0 | 6% | 0 | 14% | 0 | 86% |
| 36:21% | |||||||
| Grassland species, | 61% | 26% | 13% | 9% | 56% | 3% | 30% |
| 23:13% | |||||||
| Xeric Scrub species, | 33% | 66% | 0 | 0 | 100% | 0 | 0 |
| 3:2% | |||||||
| Unanalyzed species, | 64% | 27% | 9% | 26% | 26% | 0 | 48% |
| 11:6% |
Limnic Habitats
Of Kansan birds, 36 species (20 per cent) prefer limnic habitats ([Table 1]). Udvardy found this group to represent 15 per cent of the North American avifauna. Kansas is not notably satisfactory for limnic species, and only 38 per cent of the total North American limnic avifauna is present in the State.
Thirty-one species of limnic birds belong to families that Mayr (1946) considered to be unanalyzable as to their geographic origin; of the five remaining species, all seem to be of North American origin. Other characteristics of limnic birds are summarized in tables [4] and [5].
Grassland Habitats
Twenty-three species of our total can be called grassland species ([Table 1]). The subtotal is less than one-fifth of the Kansan avifauna, but it represents 72 per cent of the grassland birds of North America; grassland habitats abound in Kansas. Only 5.3 per cent of all North American birds are grassland species (Udvardy, 1958).
About 56 per cent of these birds are of North American stocks, nine per cent of Eurasian stocks, and three per cent of South American stocks. The percentage of North American species is the greatest for any habitat group here considered. Other characteristics of grassland birds are summarized in tables [4] and [5].
Table 4.—Analysis by Habitat-type and Residency Status of Historic Avian Stocks in Kansas