11 May 2019 – another Summer Tanager (the 400th casualty)

It was a bitter milestone this morning as I encountered the 400th casualty on this project since I began regular monitoring in August of 2009.

Again, the long-term idiosyncrasies of this long-term monitoring have revealed something new. In this case, there have been 4 total Summer Tanagers I’ve recorded as window-kills since 2009. The first was on May 3rd 2013. That’s 6 years ago, and it was 4 years into the project. The last three were May 4th, May 6th, and May 11th of this year. So in one week in the tenth year of a project we’ve turned on its head what we thought we knew about Summer Tanager collision risk here.

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