The other day I swear I saw one of the wrens moving a baby out of the house. They've completely vacated. That sounded like the right answer - the wrens may have been old enough to be fledged. But we asked our wren expert, All Things Natural columnist Ed Kanze, for his take on the observation, and he couldn't help a bit of the tongue in cheek. And the risks would seem to greatly outweigh the gains.
People are often surprised how quickly birds fledge from a nest.
Sunning is a technique in which a bird will flatten himself against a warm surface. Or the bird may expose only one wing at a time to the flat surface. In this case, a chickadee landed on the barn roof. He appeared very nervous - and well he might, since he was out in the open and in a position where he could be easily attacked. In cold times many birds employ this technique to warm up quickly, using a roof or a sidewalk or earth.