Date: 8/26/19 8:14 am
From: Daniel Edelstein <danieledelstein...>
Subject: [wisb] Comment Regarding: Bobolink Dispersal & Migration
>
> From: ROBERT SPAHN <rspahn...>
> Subject: Bobolinks
> Date: August 24, 2019 at 6:05:24 AM PDT
> To: <danieledelstein...>
>
> Hi Daniel,
> Interesting observations and questions.
> I have lived for a considerable time (50 years+) in upstate NY, but grew up in E. Iowa with a family cottage in N. Wisconsin and get back there virtually every
> year. For the past 5 years I have made sure my visits coincided with the peak of "confirmation" season for the WI BBA II project = most of July. In NY, I have
> been writing local monthly summaries and writing or editing quarterly regional reports for our state birding journal, The Kingbird, for 40+ years.
>
> Bobolinks are interesting and much of their behavior matches what you have observed and read. After breeding, the Bobolinks here in NY (we're about
> the latitude of the lower middle of WI in the Rochester area) move to the big fresh water marshes, like Montezuma NWR, the Iroquois NWR complex, and
> the ends of the Finger Lakes. This move can start by early July and the interquartile range (= 50% of the time over the years) of their departure date distribution
> is September 2-11, with the last seen earlier 25% of the time and later 25% of the time.

> It is not particularly unusual to have individuals still found in the marshes
> as late as mid-October. We have had a fun, big-day, money raising event in the Montezuma area for 23 years now on a Friday evening to Saturday evening
> in mid-September. We always have Bobolinks in the marshes then, often in substantial numbers.

> Looking to your comment about only seeing females, I'd say don't be so sure. Since the males are into molting into a plumage that looks very like the females
> and the young of the year look like females, it really is not clear that you are not seeing a mix, certainly by well into August males may be hard to ID as such.
>
> Best regards,
> Bob Spahn


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