. The condor. Birds; Birds; Birds. 30 THE CONDOR Vol. XIX iy, and aspen. These growths afford nesting sites for a large number of birds. Those of the larger streams that continue to flow any great distance through the sage plains have cut deep channels through the lava and do not water the region on either side. Since the passage of the homestead laws permitting 320 acre claims through- out the arid regions, a greater portion of the sage covered plains have been taken up by settlers. While only a small part of the entire area is under cultivation at the present time, it is only a question of a
. The condor. Birds; Birds; Birds. 30 THE CONDOR Vol. XIX iy, and aspen. These growths afford nesting sites for a large number of birds. Those of the larger streams that continue to flow any great distance through the sage plains have cut deep channels through the lava and do not water the region on either side. Since the passage of the homestead laws permitting 320 acre claims through- out the arid regions, a greater portion of the sage covered plains have been taken up by settlers. While only a small part of the entire area is under cultivation at the present time, it is only a question of a few years when the sage brush will give place to grain fields, which will no doubt exert an influence towards a change in the avifauna. My observations, from which the following list is compiled, date from June 7 to August 29, 1916. While the list does not include all the birds that occur in the region throughout the entire year, it contains a large majority of the species to be found during the summer months. M 0 N T| A N A. Pig. 7. Map of Fremont County, Idaho. 1. Colymbus auritus? Horned Grebe. A small grebe, which I took to be of this species, was seen on the outlet of Henry Lake, August 17. It disappeared below the sur- face of the water, permitting but a few seconds for identification. 2. Gavia immer. Common Loon. Occurs sparingly on Henry Lake. Several mounted specimens examined in a collection at Lake Post Office. 3. Pelecanus erythrorhynchos. White Pelican. Three birds seen flying near shore of Henry Lake. Mounted specimen examined in a collection at Lake Post Office. 4. Mergus serrator. Red-breasted Merganser. Occurs sparingly on Henry Lake. 5. Anas platyrhynchos. Mallard. A number of large flocks of mallards were seen just at dusk flying low over the small marshes along Ice House Creek, August 16. A female with four young able to fly seen on Ice House Creek, August 26. Quite a num- ber were seen on the north fork of the Snake River, August 25. 6. Mareca americana. B
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