Extra egg in bluebird box

[phillyblues]

Here’s a weird one. A family member who has bluebirds nesting shared this photo with me of what looks to be a (6th)tree swallow egg in the mix. I wonder if it was there already before the bluebirds laid eggs? Could it be a tree swallow laid one in there?

• This topic was modified 1 year ago by phillyblues.
• This topic was modified 1 year ago by phillyblues.

[phillyblues]

Photo of bluebird nest

• This reply was modified 1 year ago by phillyblues.

[tamsea]

Looks like it for sure. My guess is either the TRES started laying and stopped and the bluebird took over or vice versa.

Tammy

[phillyblues]

Hmmmmm… velly interersting

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