Sat Jun 26, 2021 12:22 am
I think it not only kills young birds but it'll stop a hen from even nesting.....I think it probably kills a fair amount of the adults.
They checked ruff grouse for west nile by getting samples from hunters in MN, WI, and MI. First off, they wanted 1500 and had a hard time getting half that....so that right there is troubling. MN grouse tested at a positivity rate of 12.5%, MI about the same, and WI was at 28.5% with it showing up in the heart tissue of quite a few (they turned in blood samples along with heart tissue samples).
Now 12.5% might not sound that alarming, but that's from a sample of grouse shot in the fall....when mosquito season has wound down and completely over when those birds were sampled.
The study just verified that the virus is widespread in the grouse population, and keep in mind only the grouse that lived were part of the population. The study shed no light on how many birds didn't make it, how many never nested, nested but had all of some of their offspring die, etc.
12.5% in the birds in the fall in my opinion means it could be as high as 60%, 70%, 80%, who knows how high in the population two to three months before that with a severe mortality rate.
What kind of floors me is how nonchalant the DNR has been and how they haven't sounded the alarm and put some boots on the ground to try to find out what the actual impact this is having on grouse....
...not to mention ducks.
It affects different bird species differently. It's been brutal on crows while doing nothing to robins for instance. They think grouse are middle of the spectrum as far as how badly west nile affects them. On wood ducks? Who knows?
All I know is that if the link for it being transmitted is mosquito exposure.....
....your average MN would duck is going to be more exposed to it than a grouse and that this is something the people in charge of monitoring their populations need to take a close look at. I was going to say a "closer look" but as far as I know they've yet to even look.
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