Cavity Nester Nests, Eggs and Young Photos and Bios:
Black-capped Chickadee nest in a small NABS box. Photo by Bet Zimmerman. See photo album of birds visiting the exterior of this box (shots taken with a birdcam).
Chickadees are capable of excavating their own cavity. They may prefer birches for excavation because the outer bark stays intact, while the inner bark gets soft when rotten. This may explain why they seem to be attracted to Gilberston PVC boxes painted to look like white birches.
Chickadee nests can be confused with Tufted Titmouse nests, especially in the early stages of construction.
Description:Downy nest with moss base, topped with fur and soft
plant fibers. Female may cover eggs with moss/fur when leaving
the box. Very thin-shelled white/cream eggs with light brown/reddish speckles, dots or blotches, little or no gloss, spots may be concentrated more on the wide end of the egg.
A Black-capped Chickadee nest in a Gilbertson box, with no nesting material underneath. Photo by Bet Zimmerman.
The box is in a wooded area with no wren guard. The nest and eggs were removed two days later by a House Wren.
Photo by Ed Wagaman of West Virginia.
Notice how much more "fluff" is in the nest above. Photo by Bet Zimmerman of CT
Black-capped Chickadee nest. Photo by Peter Kwa. There are two eggs (part of one is visible) to the right of the nestling in the nestcup, which did not hatch.
The floor size on this nestbox is 4" x 4" so that the nestcup can be estimated to be about 2" diameter. The moss base is about 1" to 1.5" thick.
1/2" of pine shavings were placed under the moss base to entice Chickadees to nest. Most of the shavings were 'excavated' by the Chickadees. The fur lining is dog fur put in a suet cage about 20 feet away from the nestbox.
At 8 days, the nestling was observed reaching for its preening gland and going through the motions of preening, even though it barely has feathers.
The mother sits tight when the box is opened. Notice baby in lower left gaping. Nestlings were born today. Photo by Bet Zimmerman.
Three day old chickadee babies. Photo by DH of Pam of the Bluebirding Forum. (Photo taken using a mirror?)
6 day old BCCHs. Photo by Bet Zimmerman.
Black-capped Chickadees in a Gilberston box. Not sure what day they hatched. One unhatched egg. It was infertile (I find that infertile eggs float.) Photo by Bet Zimmerman.
Another BCCH nest in a Gilbertson box. Photo by Bet Zimmerman. Notice two unhatched eggs.
Chickadees have also been known to nest in rotted wooden fence posts and open stumps. See photos.
11 day old BCCH nestlings. Photo by Bet Zimmerman.
12 day old BCCH nestlings. Photo by Linda Moore. Only 2 of the 5 eggs that were laid hatched.
The fur from Linda's golden retriever was used. She was surprised at how quickly the nest was constructed. They can make a nest in 3-4 days. See All About Chickadees.
6/9/07. There were 5 BCCH nestlings until I removed the Wren Guard - then 3 disappeared. These two were left, and are on Day 13 (with Day 1 as hatch day). Photo by Bet Zimmerman.
These BCCH chicks hatched more than 10 days ago. Photo by Bet Zimmerman. The nest was protected by a Wren Guard.
One of Linda Moore's fledglings.
The student of Nature wonders the more and is astonished the less, the more conversant he becomes with her operations; but of all the perennial miracles she offers to his inspection, perhaps the most worthy of admiration is the development of a plant or of an animal from its embryo.
-Thomas Henry Huxley, British biologist and educator. Reflection #54, Aphorisms and Reflections, selected by Henrietta A. Huxley, Macmillan, 1907.
