Niche: Tree swallow, house wren, mountain chickadee, European starling, northern flicker and other woodpeckers, and rodents compete for nest sites.
(Tree; swallow; ) Context(Tree swallow,List([7, 19))):(house wren, mountain chickadee, European starling, northern flicker and other woodpeckers, and rodents; compete; for nest sites)
Tree swallow,List([7, 19))
Tree house wren, mountain chickadee, European starling, northern flicker and other woodpeckers, and rodents
swallow compete
for nest sites