Pennsylvania Game News - July 2022 - 13

Searching for . . .
Kestrel
Clues
By Bob Frye
I
F YOU'VE EVER played " Clue "
you understand the challenge that
is solving the riddle of American
kestrels.
North America's smallest falcons
- comparable in size to blue jays -
kestrels are mired in a slow-but-steady
decline. Game Commission Ornithologist
Sean Murphy said kestrel populations
across North America fell by 1.4%
per year from 1966 through 2019.
They're doing both better and worse
here. Across Pennsylvania as a whole,
kestrels faded away by about 1% per
year over that time, Murphy added. But
in southeastern Pennsylvania and the
surrounding greater Piedmont region,
they dropped by about 2.67% annually,
and by 73% overall since 1966.
That's among the steepest declines in
the country.
The neighboring states of Delaware
and New Jersey have gone so far as to list
once-common kestrels as state endangered
and state threatened, respectively.
So what's going on?
In the board game, players must
figure out not only who committed
murder, but how and where. Was it
Colonel Mustard with a lead pipe in the
library? Professor Plum with a wrench
in the conservatory? Someone else,
with something else, somewhere else?
There likewise are multiple suspects,
tools and environments to consider
when pinning down what's troubling
American kestrels.
" There are a lot of theories, but little
direct evidence as to what the cause or
causes of their decline are, " said Dan
Mummert, wildlife diversity biologist
for the Game Commission's Southeast
Region. " So there are all sorts of factors
perhaps in play. "
Habitat loss might be an issue.
Changing agricultural practices. West
Nile Virus. Toxins like rodenticides,
pesticides, herbicides and petroleumbased
fertilizers. Competition from
other species, including non-native
Unraveling this raptor's decline
JULY 2022
13
Jacob Dingel

Pennsylvania Game News - July 2022

Table of Contents for the Digital Edition of Pennsylvania Game News - July 2022

Contents
Pennsylvania Game News - July 2022 - Cover1
Pennsylvania Game News - July 2022 - Cover2
Pennsylvania Game News - July 2022 - Contents
Pennsylvania Game News - July 2022 - 2
Pennsylvania Game News - July 2022 - 3
Pennsylvania Game News - July 2022 - 4
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Pennsylvania Game News - July 2022 - 7
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Pennsylvania Game News - July 2022 - Cover3
Pennsylvania Game News - July 2022 - Cover4
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