All About Nesting
As winter retreats from the fields, birds begin to sing songs of courtship. Each day it gets louder and more varied as spring species migrate into the area and everyone begins establishing territories. While most birds prefer a tree or bush to nest in, a few species will choose to use a birdhouse. In our area nesting season is from March to July, so lets talk about birdhouses!
Who Will Use a Birdhouse?
A birdhouse is a substitute for a cavity in a tree, either formed natually as the tree grew or by a Woodpecker. Therefore, birds that are typically cavity nesters will be the ones you are looking to attract with a birdhouse. There are two kinds of cavity nesters: primary and secondary. Primary cavity nesters are your woodpeckers, who will actively create a new hole in a tree to nest in. Secondary cavity nesters are species that prefer to nest in a tree cavity but can not create their own holes. Most of your nestbox tennents will be secondary cavity nesting species, however you can occasionally get a woodpecker to nest in a birdhouse as well.
Species that you most often see using a birdhouse include:
- Tree Swallows
Species that are less frequently seen in a birdhouse, but may still use one inlcude:
- Smaller Woodpeckers
- Wood Ducks
- Screech Owls
- Purple Martins
The invasive House Sparrow will also readily use a nestbox if the hole is large enough for it.
Choosing the Best Birdhouse for Your Yard
The size of the entrance hole will determine who can and can't use a birdhouse. Most houses that we carry have entrances that are either 1 1/8 inch or 1 1/2 inch in diameter. Wrens and Chickadees can fit into the 1 1/8 inch diameter houses. If you want to attract Bluebirds or Tree Swallows however, you will need a house with a 1 1/2 inch diameter hole. Nuthatches and Titmice will also use the 1 1/2 inch hole house.
Species such as Woodpeckers, Wood Ducks, Screech Owls, Flycatchers, and Purple Martins require more specialized housing. You can ask an associate about these houses and if they would be appropriate for your yard.
What to Do About House Sparrows
House Sparrows are an invasive species from Europe that will readily nest in a birdhouse. They can be rather agressive and will compete for house space wtih your other birds. Detering these troublesome birds fro nesting in your yard and houses can be a challenge. One way is to not put up houses that they can fit into. Nestboxes with a 1 1/8 inch diameter hole are too small for House Sparrows to fit into, so they will not be able to occupy them. If you are trying to get Bluebirds or Tree Swallows however, you will need the larger diameter hole that the Sparrows can also fit into. If this is the case, the best you can do is remove the House Sparrow nest from the birdhouse when they are building it and hope that your Bluebirds or Swallows will swoop in and occupy the house before the Sparrows can rebuild.
Have More Questions About Nesting?
Stop in and ask any of our expert associates about setting up a birdhouse in your yard! We are happy to answer any questions you may have.