Posted by: atowhee | May 20, 2014


In North America the co-operation between humans and members of the swallow family has increased over the past two centuries. In the mid 1800s naturalists noted how the Barn Swallow had begun to nest around buildings in Northern California. Today Tree Swallows and Purple Martins regularly use nest sites provided by people. Sometimes Tree Swallows will appropriate a box first intended for bluebirds. Martins are colonial nesters so they oust House Sparrows and take over the provided tenements. Barn and Cliff Swallows regularly use manmade structures from bridge to barns to porches across their range.
martinropolis A Purple Martin tenement at Ottawa NWR, Ohio.puma gourd

PUMA FRNT A perched Martin.

trsw holeTree Swallow nesting in a natural hole.

trsw shape

bars nest
Barn Sweallows working on nests on the side of a building.
Many other birds now take advantage of intentional or incidental manmade nest sites: Barn, Great Horned, Great Gray and Screech Owls, European Kingfishers, many raptors nest on pylons or utility poles, Wood and other ducks, nuthatches, chickadees, bluebirds or all three species, phoebes, House Wrens, White-throated and other swifts. In Europe the most obvious building users are White Storks.



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