Subject: [Tweeters] Violet-green Swallow nest box placement
Date: Mar 13 19:59:10 2009
From: mgd at myuw.net - mgd at myuw.net
I have a swallow box on the SW corner of my house and I figured the birds
must just bake in there on hot days. In 2006 I watched them on webcam and didn't notice any difference in the chick's behavior on hot days vs. cool days.
They didn't use the box last summer and I took the opportunity to place
a remote thermometer in there and to monitor the temperatures readings it
beamed into my house.
Here is an excerpt of the temperatures I recorded on June 28, 2008 (which is when they typically have large young in the nest):
Time Ambient Temp Nestbox Temp
0550 66 66
0705 66 66
1040 71 71
1150 78 77
1405 85 87
1445 85 91
1540 87 97
1630 88 98
1710 88 99
1835 89 92
1935 85 87
2105 83 82
2150 83 80
2350 75 73
The box didn't heat up as much as I thought it would and it certainly cooled down faster than I expected--even a little faster than the ambient air temperature although the difference was minor.
Remember that birds have higher body temperatures than we do--between 104 and 108 degrees F, so can tolerate warmer temperatures.
This doesn't really answer the question about where Josh should place his swallow box but I wanted to add information to the discussion.
Mike Donahue
Beacon Hill in south Seattle