Managing for wildlife:
Becoming a good wildlife manager requires learning the essentials about the animal to
be managed; where it lives, how it lives, and what it needs to survive and flourish.  
Creating a good Tree Swallow nest box project requires learning some basic Tree
Swallow characteristics and habitat needs.  

What do Tree Swallows look like?
Tree Swallows, scientific name Tachycineta bicolor, are small songbirds.  Like all
swallows they are fast, agile fliers that catch insects in their mouths as they fly.  
Tree Swallows show the typical swallow body plan:
  • Slender, streamlined bodies with short necks.
  • Long, pointed wings.
  • Small bills (but mouths that open wide).
  • Very short legs with small feet.

















Most adult Tree Swallows can be told from other swallows by their:
  • Shiny blue-green upper body and head.
  • Pure white throat and body underside.
  • However females in their second calendar year of life (first nesting season)
    show a mix of brown and blue-green upper body feathers, like the female
    below at right.












  • Juveniles, young Tree Swallows that have recently left their nests, have sooty
    gray upper bodies and slightly duller white under bodies (see below).









Where do Tree Swallows live?
  • Tree Swallows nest from northern Canada and Alaska south through much of
    the United States.  
  • The green areas of the map below show their main breeding range, but they
    nest locally farther south.  
  • Field guides, local bird clubs, or state conservation departments can tell you if
    Tree Swallows nest where you live.  
  • Tree Swallows winter from Florida and the Gulf Coast south into Mexico,
    Central America, and the Caribbean (red areas of the map).






















What is the natural nesting habitat of Tree Swallow like?
  • Tree Swallows prefer to nest near or in wetlands, such as marshes, swamps,
    beaver ponds and wet meadows.
  • These wetlands are usually open for easy flight and have lots of flying insects
    for food.
  • Perhaps most important, wetlands often have the nest sites these swallows
    need.























Where do Tree Swallows build their nests?
  • Tree Swallows are cavity-nesters.  They nest inside holes in trees.
  • However, Tree Swallows have a problem.  They are unable to dig their own
    cavities.  Under natural conditions they must find an old woodpecker hole or a
    cavity in a dead tree if they are going to raise any young.
  • Perhaps because there is usually a shortage of natural nest sites, Tree Swallows
    quickly accept nest boxes, even ones far from water.  
  • And although they are not colonial like some other swallow species, pairs of
    Tree Swallows will nest as close as 100' from one another if there are suitable
    nest sites and a good food supply.  This lets us create Tree Swallow projects
    with multi-box grids.



















You are going to learn a tremendous number of other things about Tree Swallows, but
understanding these basics lets you take your next step: finding a good location for
your nest box project.
















Click here for Next Step: Finding a Good Site.







                                                                 Top
Learn About Birds at Tree Swallow Nest Box Projects
Tree Swallow Basics