Bluebird and Small Cavity Nester Conservation
Sialis - Bluebirds and other small cavity nesters


Nine Egger - Tree Swallow Nest

Nine TRES eggs. HPoto by Bet Zimmerman.

On 5/19 and 6/16 there were 5 Tree Swallow eggs in this box. Two looked like they might be infertile (funny coloring).

On 6/22, there were 9 eggs, four of which (the four towards the bottom of the picture except the one at 5:00 o'clock) had a pinkish tint, indicating they are probably new. It's possible the female realized the eggs were not going to hatch, and laid a new batch, leaving the older eggs in place. It's also possible that something happened to the original female and another female took over the nest.

The following week (6/30 - see photo below) I only saw 8 eggs. Four were pure white, four pinkish. Most of the TRES in neighboring boxes on this trail have already fledged.

Nine eggs in TRES nest.
On 7/7/07, I found three newborn TRES in the nest. Young from all other boxes in this area have already fledged.
Tree Swallow nestlings.  Photo by Bet Zimmerman.

Links and More Information:

Cavity nester photos of nests eggs and young

Cavity Nester Nests, Eggs and Young Photos and Bios. Also see Nest ID Matrix (contents) and Egg ID Matrix (color, spots, etc.)

Pictures of bluebirds and other cavity nesters

Previous Pictures of the Week: © Original photographs are copyrighted, and may not be used without the permission of the photographer. Please honor their copyright protection. If you would like to use a photo for educational purposes, you can contact me.

    You cannot begin to preserve any species of animal unless you preserve the habitat in which it dwells. Disturb or destroy that habitat and you will exterminate the species as surely as if you had shot it. So conservation means that you have to preserve forest and grassland, river and lake, even the sea itself. This is vital not only for the preservation of animal life generally, but for the future existence of man himself—a point that seems to escape many people.
    -Gerald Durrell, The Nature Conservancy

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May all your blues be birds!

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Photo in header by Wendell Long.
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Last updated March 24, 2016. Design by Chimalis.