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I7O THE ?OND01? VoL. VI April 2o to December ?. The list for the former place includes ?o6 species and for the latter io 3. There are 45 species.that are common to both regions. These are the mourning dove, turkey vulture, marsh hawk, sharp-shinned hawk, Cooper hawk, Swainson hawk, Ferruginous rough-leg hawk, golden eagle, sparrow hawk, burrowing owl, kingfisher, Cabanis woodpecker, Lewis woodpecker, Red-shafted flicker, dusky poor-will, white-throated swift, Arkansas kingbird, Say phoebe, western wood pewee, common crow, western meadowlark, Bullock oriole, Brewer blackbird, Pine siskin, western lark sparrow, western chipping sparrow, Lincoln sparrow, black-headed grosbeak, lazuli bunting, western tanager, cliff swallow, barn swallow, tree swallow, violet-green swallow, cedar waxwing, western war- bling vireo, Cassin vireo, yellow warbler, Tolmie warbler, long-tailed chat, western mockingbird, rock wren, russet-backed thrush, western robin. Some of these are more abundant in one region than in the other. The white-throated swift is one of the most noticeable birds in Sioux county. I saw the bird only once in Santa Cruz county. The numbers of individuals of the species of swal- lows is greater in Santa Cruz county. Many of the species are found at different times of the year in the two localities. The Say phoebe is one of' these, for in Sioux county it is a rather common breeder while in Santa Cruz it is a winter resident. The western tanager, Audubon warbler, western robin, and a few others are birds of this s()rt. Most of the species spend the winter in Santa Cruz county but only those that are able to resist the severe cold stay in Sioux county. Oc- casionally however where owing to the constant seepage of water the ground d()es not freeze the Wilson snipe may be found all winter. As t() species the gallinaceous birds are better represented in Sioux county; the bob-white, prairi e sharp-tailed grouse, and sage hen are all found there. Noue of them are so common as is the California quail in Santa Cruz county. The band-tailed pigeon is not found in Nebraska. Some years it is very common in .the Pajaro valley, so I am told, but last year the species was rather rare. l'he condor, white-tailed kite, duck hawk, barn owl, long-eared owl, and California screech owl were recorded in Santa Cruz county. Some of them undoubtedly occur in Sioux county but were not seen there. The western red-tailed hawk is replaced there by the Krider hawk, and the Pacific horned owl by the western horned owl. The barred owl's characteristic hoot is often heard in Sioux county but not in Savta Cruz. The prairie falcon although occuring in Santa Cruz county was not seen during the summer, in Sioux county. This is due to the fact that the country is thinly settled and the birds have a chance to live undisturbed. The order Coccyges is represented by different species in the two localities; in Nebraska there are the yellow and black-billed cuckoo; the road-runner and California cuckoo do not occur there. One of the most conspicuous woodpeckers in Sioux county is the red-headed, which is replaced in California by the California woodpecker. None of the smaller members of the genus Dryobates have been noted in Sioux county, but in Santa Cruz the willow woodpecker is common. The Macrochires are stronger on small species in California and on large species in Nebraska. Two hummingbirds, the Anna and rufous, are common in Santa Cruz county but are not found in Sioux county; neither does the Vaux swift occur there. The nighthawk on the other hand is very common. The most common flycatcher in Sioux county is the Say phoebe, while the black phoebe is the most common in Santa Cruz. This and the western flycatcher