Monday, June 27, 2016

Como Park Bluebird Trail Update: June 27th, 2016

Post contributed by Sharon, volunteer bluebird trail monitor:
Bluebird and cowbird eggs

So far this nesting season 19 bluebirds and 9 chickadees have fledged from the 11 boxes on the trail. In round number two of nesting, there are currently 8 bluebird eggs and 3 cowbird eggs in 5 bluebird nests. Cowbirds lay their eggs in the nests of other birds, usually one or two eggs per nest. The cowbird eggs hatch sooner and the young birds grow faster, giving them an advantage over their host birds. Up to 11 tree swallows will fledge in the next week. Four boxes are now empty.