My data is anecdotal, but I am optimistic that
the cold snaps and snows of this winter will not affect the wrens as badly as
the cold snaps of the 1970's did. When I moved here in 1972, I never saw
Carolina Wrens in the suburbs, as I often do now, nor did they come to my
feeders. They were regular birds in wooded areas containing thick
undergrowth but much less numerous than they are today. Also, the cold snaps of
the 1970's lasted much longer. I remember one in the mid seventies after which
it was normal for a year or two to miss Carolina Wren on a typical
day of birding the Kansas City area.
Here's what's different now:
There are a lot more wrens to start
Apparently having evolved to handle suburban
habitats, more can take advantage of feeders.
This winter's cold snaps have only lasted a few
Carolina Wrens have a high rate of
reproductive productivity, laying 4 to 6 eggs and raising 2 or 3 broods per