. Wild animals of Glacier National Park. The mammals. Glacier National Park (Agency : U. S. ); Mammals; Birds. BIRDS. 181. tree swallows with their snowy underparts and burnished steel-blue upperparts. The parents were still going to the nest holes, which were respectively about 8, 15, and 20 feet from the ground, but part of each family seemed to have flown and the air was alive with birds weaving about among the trees. Toward simset we found a number of them on the telephone line that marks the 1;oundary of the park. Thej and some mountain bluebirds had possession of the wires, but (hough th
. Wild animals of Glacier National Park. The mammals. Glacier National Park (Agency : U. S. ); Mammals; Birds. BIRDS. 181. tree swallows with their snowy underparts and burnished steel-blue upperparts. The parents were still going to the nest holes, which were respectively about 8, 15, and 20 feet from the ground, but part of each family seemed to have flown and the air was alive with birds weaving about among the trees. Toward simset we found a number of them on the telephone line that marks the 1;oundary of the park. Thej and some mountain bluebirds had possession of the wires, but (hough there seemed to be abundant space, the swallows apparently wanted it all. Several times there was a heated chase, and once when a gentle bluebird was driven low it actuallj' sat down on the ground and let the domi- neering swallow go by. At Mirror Pond near the Gunsight Trail tree swallows and probably cliff swallows were flying about over the quiet water with its yellowish green marshy border, disappearing up the river vista with its beautiful view of Gunsight Pass and its guarding peaks. NOETHEEN ViOLET-GEEEN SaVALLOW : TacJii/cineta thalassina lepicla.—The swallows of the park need to be very carefully discriminated. The two with the brown breast are the barn swallow with the long forked tail, and the cliff swallow with the light forehead and pale rufous rump, while the two that are snow white underneath are the tree swallow, with the steel-blue upperparts, and the violet-green swallow, whose green crown and back contrast sharply Avith the violet of the rump patch. The cliff swallow makes a retort-shaped mud nest, often hung from a cliff or roofing slab of rock, while the barn swallow makes a cup-shaped nmd nest often attached as a wall pocket to a rafter in a barn. The tree and violet-green swallows nest in holes in trees, and the violet also in cliffs. As it will nest in knot holes and bird houses, it is one of the birds that may be attracted by offers of hospi- tality. It
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectmam
