Cavity-Nesting Birds

Hairy Woodpecker feeding young at nest hole

Hairy Woodpecker brings food to its young.

Birds choose to lay their eggs in a phenomenal variety of places—from bare rocks and ground to twig platforms to hanging baskets sewn together with spider silk. In forested areas, another option is the cavity nest.

Around 85 North American bird species raise their young in tree cavities. In some cases, the bird itself makes the hole. In other cases, it may enlarge cavities created by natural decay or by the activity of other birds.

Woodpeckers are among the best-known cavity nesters, but also help provide nesting holes for owls, swallows, nuthatches, and many others who may enlarge holes started by the woodpeckers. Here are photos of just a few cavity-nesting species that live near me in the Pacific Northwest United States.


 

This Northern Flicker excavated its hole for days

This Northern Flicker worked for days clearing a hole.

Northern Flicker

Lovely, isn't he?

 


Red-breasted Sapsuckers create dramatic rows of holes in tree bark, as seen below. They feed not only on the sap that flows, but also on the insects that the sap attracts.

Red-breasted Sapsucker at nest hole.

Red-breasted Sapsucker

A Sapsucker created this pattern of holes.

 


 
This tiny Red-breasted Nuthatch is bringing a small grub to its young. Both parents tend to the babies.

Red-breasted Nuthatch bringing food to its young.

Male Red-breasted Nuthatch.

 

 

 


I discovered this pair of Bewick’s Wrens bringing grassy nesting material into this natural tree cavity about 15 feet up a Cottonwood Tree:

Bewick's Wrens preparing a nest.

Bewick's Wrens bring nesting material into a natural cavity.

 

 

 


The Northern Pileated Woodpecker is North America’s largest woodpecker, not counting the Ivory-billed Woodpecker, which is commonly believed to be extinct. Its holes are distinctly rectangular:

Northern Pileated Woodpecker

Northern Pileated Woodpecker

 

 

 


Below, a Black-capped Chickadee carries wood chips far from the hole where it cleared them—possibly a strategy to avoid a pile of chips that might call attention to the nest? Below right, a Tree Swallow stakes out a home for its family.

Black-capped Chickadee.

Black-capped Chickadee discards wood debris.

Tree Swallow

A Tree Swallow in a natural cavity.                  

 

Want to learn more about cavity-nesting birds? An excellent resource is the book The Owl and the Woodpecker by acclaimed nature photographer Paul Bannick (www.paulbannick.com). Complete with stunning photos and an audio CD of nature recordings, the book delves into the diversity of these two families of birds and the ways in which they define and enrich the ecosystems they inhabit.


 

 

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One Comment

  1. Posted November 18, 2014 at 2:24 am | Permalink

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