Last weekend I noticed a Carolina chickadee
gathering nesting material and then heading towards my bluebird box. A bit
later I checked the interior of the box expecting to see the tell-tale signs of
a chickadee nest; a thick mossy base with a cup lined with animal hair. Instead
I found the box stuffed with pine needles, the sure sign that an Eastern
bluebird had gotten there first. A few days later I checked the box after dark
and saw a chickadee sitting atop the pine needles. So I’m assuming the Carolina
chickadees won out over the Eastern bluebirds.
This illustrates that despite the proliferation
of folks who now feed and attract birds to their yards, there is still a
shortage of suitable nesting sites for cavity-nesting birds in urban areas.
There are primary cavity nesters, those species like the woodpeckers that make
their own cavities; and the secondary cavity nesters that move in after the
woodpeckers have moved on. These secondary nesters can’t excavate their own
home so they are dependent on the woodpeckers and folks who erect bird boxes
for their nesting sites.
If every tree that dies or develops hollow
cavities was allowed to stay standing there would be more natural sites.
Understandably, in urban areas the dead trees are often quickly removed.
In an residential neighborhood there are about
ten native species that might use a nest box if provided. Carolina chickadees,
tufted titmouse, brown-headed nuthatch, house wren, Carolina wren, great-crested
flycatcher, Eastern bluebird, barred owl, and Eastern screech-owl all could
potentially use an appropriate box. In more rural settings, American kestrels,
barn owls, tree swallows, wood ducks, and purple martins could use appropriate
housing if provided.
I encourage you to provide a nest box in your
yard to help alleviate the cavity shortage. It is not too late to put one up
even though nesting has started for some species. Many of them have multiple
nestings in a year. Make sure to pick a species that you want to attract so you
can provide the entrance hole specifications for that species.
If you enjoy watching wildlife, an active nest
box will provide great opportunities to observe nest building, feeding of
young, fledging of young, and post-fledging activity.
Below are a few species that might use a bird box:
Lets start with the easiest to attract. Eastern bluebirds often will check out a box within minutes after erecting it.
Eastern Bluebird by John Ennis |
Carolina chickadees vie with Eastern bluebirds for the choicest sites. Provide a custom bluebird box and a custom chickadee box to accommodate both.
Carolina Chickadee by Phil Fowler |
Tufted titmice, cousins to the Carolina chickadees, readily accept a bird box too.
Tufted Titmouse by John Ennis |
Brown-headed nuthatches need some help. This southeastern specialty doesn't compete well with other species for nest sites. Providing a custom built nuthatch box will help out this declining species.
Brown-headed Nuthatch by Jeff Lewis |
Tree swallows are increasing in Mecklenburg County. You will need open country and acreage for them
Tree Swallow by Jeff Lewis |
Great crested flycatchers are large birds and need a larger box. But they will readily use a custom box built to their specifications. they are present in the treetops in most neighborhoods.
Great Crested Flycatcher by Phil Fowler |
The prothonotary warbler uses low swamps as a habitat. they also are the only eastern warbler that utilizes bird boxes. Forget it if you aren't near some swampy lowlands, but if you back up to Four-Mile Creek Greenway, Lower McAlpine Greenway, or McMullen Creek Greenway you might get lucky.
Prothonotary Warbler by John Ennis |
Songbirds are not the only bird group to use nest boxes. Eastern screech-owls readily take them but you will be lucky to get them. Woodlots made up of hardwoods might harbor a pair of screech-owls.
Eastern Screech-owl by John Ennis |
Even large owls will take a box if it is large enough. This barred owl chick was in a cavity in Latta Park in Charlotte. There is an owl box there that has been used most years, but last year the owls used a natural cavity.
Barred Owl Chick by Lee Weber |
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