rom a couple of years ago. The wren in these photos flew up in front of us on 13 June 2016 at Lake Byllesby Regional Park in Dakota Co. It behaved slightly differently than others I have seen. The others were aggressive, keeping their heads down and tails cocked up. The one seemed more curious about us than angry. It stretched its neck up while it checked us out.
Actually little is known about Sedge Wren biology (Herkert et al. 2001). Where and when the wrens breed tend to be unpredictable and they are hard to see in their grassy habitat. See another previous post for a discussion of Sedge Wren distribution.