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Re: Wings and cars





On Thu, 21 Mar 2013, Clair Ossian wrote:
The birds near the highway were indeed thinned out, but I believe it was due
to Darwinian selection and selecting out those that were not able to
recognize the problem and change their habits quickly enough.

I am afraid that I cannot give an honest answer as to how many birds were on
the road before and after. I would suspect that given the excellent food
supplies at the road, the populations that managed to survive the selection
process would simply have a population boost, since they no longer were in
competition with those birds that were selected out of the population.  I
suspect that after some period of time, the general overall numbers ought to
have returned to normal, or nearly so, at least.

Well, that in itself would be worth noting. As in, how fast did the number of birds increase? If it was related to how long young were hatched and grew, or birds moving in from other nearby areas...


I am afraid that we might run into some pretty severe opposition if we try
to reproduce the experiment by going out there in the same area and upping
the speed limit by 10 mph. Bird lovers just might object.

On 3/21/13 10:38 AM, "Richard W. Travsky" <rtravsky@uwyo.edu> wrote:
On Wed, Mar 20, 2013 9:16 AM EDT Clair Ossian wrote:
...

Curious, could it also have been that the population by the road was only
just thinned out? Any way to tell the local numbers before and after?