[wisb] Re: further results GE survey
- From: joan schnabel/jeff falk <joanjeff@xxxxxxxxxxxxxx>
- To: Wisbird Network <wisbirdn@xxxxxxxxxxxxx>
- Date: Sat, 23 Jan 2010 18:59:16 -0600
Unfortunately, its not as simple as that. its not just eagles/
observers. I think you also need to consider the total number of
routes, ie how many observers on the same route, the total numbers of
miles covered, and the total number of hours out in the field,
weather, etc. These are similar to some of the variables encountered
when comparing data from different hawk watches and even the same
watch throughout the years. It is indeed true that knowing
something about where to find the eagles increases your chances,
actually way beyond the .9. The "best" route this year, perhaps
because it had the "best observer" (Scott Mehus) had 17 birds on the
route and 2 additional birds seen on someone else's route that they
drove through. Conversely one of the other routes had no birds, even
though the habitat was excellent, (and I am sure that there are
goldens there,) because no one knew the route well enough to know the
best places to spend the most time at. I think it is a fair
question to ask if the number of goldens wintering in this area is
increasing or just that we are now out looking for them. Looking at
some of the data from Hawk Ridge on numbers of Goldens seen on
migration is helpful, but again the hours of the count have increased
with the years. Anyway it is a great question to ponder, and I'm just
glad that these birds are here, and that as we make more and more
people aware of the possibility of seeing goldens, the number of
sightings will increase both on and off the survey day. Maybe you can
join us next year. Thanks for the comment. Joan Schnabel Fountain
City
On Jan 23, 2010, at 3:30 PM, Jesse Ellis wrote:
> Just a little more math on this, which I find interesting:
> 2009 - 0.88 Eagles/observer
> 2008 - 0.89 Eagles/observer
> 2007 - 0.92 Eagles/observer
> 2006 - 0.60 Eagles/observer
> 2005 - 0.84 Eagles/observer
>
> My apologies to Joan if you were going to do a breakdown yourself. I
> find
> this fascinating. Apart from 2006, those numbers are really similar
> across
> years, suggesting that perhaps knowing something about where to find
> eagles
> in WI will net about .9 Eagles per observer. (So bring at least two
> people.)
> It would be interesting to have data on time input as well, of course.
> Still, the consistency is remarkable. What happened in 2006, anyone
> know?
>
> Thanks for the post, Joan. It will be interesting to see how 2010
> holds up.
>
> Jesse Ellis
> Zoology Dept
> UW - Madison
>
> On Sat, Jan 23, 2010 at 3:20 PM, joan schnabel/jeff falk <
> joanjeff@xxxxxxxxxxxxxx> wrote:
>
>> Hi I had a few requests for more specific data. I neglected to
>> mention in the previous post that sometime next week more complete
>> results will be up at the National Eagle Center's web site.
>> Nationaleaglecenter.org so please check there. Basically the
>> numbers have been increasing each year as have the numbers of
>> observers. This years numbers look slightly lower than last years,
>> but not all the surveys are back yet, and the numbers for the count
>> week haven't been totaled. If you have more specific questions that
>> are not answered on the website next week, either email me back or
>> check with Scott Mehus at scott@xxxxxxxxxxxxxxxxxxxxxxx Thanks for
>> all the interest. Joan Schnabel Fountain City WI
>>
>> 2009 100 observers 88 Goldens (total includes count week)
>> 2008 67 observers 60 Goldens
>> 2007 47 observers 51 Goldens
>> 2006 48 observers 29 Goldens
>> 2005 25 observers 21 Goldens
>>
>>
>> preliminary data for 2010 85 Goldens no break down available yet
>> by states Mn WI IA
>>
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>
>
> --
> Jesse Ellis
> Madison, Dane Co, WI
>
>
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