Swallow Bird House Height. The roof should be slanted to keep water from getting in. *these species species use a nesting shelf (3.
Rated 5 out of 5 stars. A neat cup of grasses, weeds, pine needles, moss and other plant material, almost always with a soft lining of feathers. 2.5” (6.35cm) 1.5” (3.8cm) tree swallow :
A 1 1/2″ diameter entrance hole is located 6″ above the floor.
Build a birdhouse or nest shelf with one of these free plans. 5 to 10 feet above ground for bluebirds, house wrens, nuthatches, and tree swallows; Around 90 species of hirundinidae are known, divided into 19 genera, with the greatest. Inside an apartment in a martin house, the nest is a cup of grass, leaves, twigs, miscellaneous debris and usually some mud.
