I apologize for the cross-posting to those who also subscribe to
OSBIRDS.
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This week my yard was brimming with recently arrived transients or
migrants.

All are first of season birds:

Baltimore oriole
white-crowned sparrow (subspecies leuk.) (surprisingly not seen this
winter)
black-throated green warbler
house wren
eastern towhee
blue headed vireo


Also, upon inspecting my bluebird houses I found a pair of dead tree
swallows in an empty box with no apparent injuries just some feces on
their tails. Any ideas?

Barbara Brabetz
Lost Valley, Montgomery County