[wisb] Re: 9,053 gulls in Milwaukee Harbor? Is this realistic?
- From: Jim Edlhuber <jimedlhuber@xxxxxxxxx>
- To: bgsloan2@xxxxxxxxx, wisbirdn@xxxxxxxxxxxxx
- Date: Sun, 20 Feb 2011 17:00:44 -0600
Greetings,
I was down at the Lakefront in Milwaukee back on Wednesday Feb 16th. I had
hopes of finding some more uncommon gulls. They were out quite far to ID,
but for Bernie?s bird count his numbers don?t look too far fetched. I
figured I photographed all gulls in the harbor one way or another but by no
means could one count the gulls by looking at the images because of the
overlapping.
I think his gull count numbers are within reason.
Here are just a couple of images of gulls from that day. The numbers add up
quickly.
*
https://picasaweb.google.com/109038919513758014473/GullsMilwaukeeFeb16th2011#5575906690801464850
*
Good birding!
Jim Edlhuber
Town of Genesee, Waukesha Co
On Sun, Feb 20, 2011 at 3:04 PM, B.G. Sloan <bgsloan2@xxxxxxxxx> wrote:
> 9,053 gulls in Milwaukee Harbor? Is this realistic?
> OK, I'm getting ready to submit my Great Backyard Bird Count report from
> Friday. I've finally found the time to estimate the number of gulls I saw on
> an ice shelf that was out by the breakwall in Milwaukee Harbor (the part of
> the breakwall that runs from near McKinley Marina to the main entrance of
> the harbor). I came up with an estimate of 9,053 gulls. Does this at all
> seem realistic? I don't want to enter this number into GBBC if it seems
> unrealistic.
>
> Here's my math:
>
> 1. This section of the breakwall is about 3600 feet long (I looked at a
> map online).
>
> 2. The gulls were fairly evenly distributed along one-half to two-thirds of
> this ice shelf. Let's say 2100 feet.
>
> 3. I took a photo of a representative section of the ice. It covers about
> 45 feet of the ice.
>
> 4. I counted 194 gulls in the photo (some birds were on the edge of the
> ice, and there were other groups away from the edge).
>
> 5. There are 46.67 45-foot-wide sections in 2100 feet.
>
> 6. Multiply these 46.67 sections by 194 gulls and you get 9,053 gulls.
>
> Does this sound within the realm of possibility? It seems like an awful lot
> of gulls!
>
> Thanks!
>
> Bernie Sloan
> Milwaukee
>
>
>
>
>
>
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