The American Kestrel was
one of my mother’s favorite birds.
This small member of the Falcon family can be seen hovering over the
grassy areas along roads and highways.
To me they look almost like an angel,
still in the air, as they hunt for bugs and mice below.
Sassy, one of the WBS resident American Kestrels (photo: Gay Schroer)
Kestrels seemed to have
been more common years ago when we had more cloverleaf interchanges and the
grass was cut short. The trend
today by most highway departments is to let the medians, interchanges and
roadsides grow up in native plants, which are only mowed once or twice a year.
The World Bird Sanctuary has placed hundreds of nest boxes along highways to
accommodate Kestrels looking for homes.
Population studies have
shown conflicting data and have shown yearly variations in populations. Some population drops were regional
phenomena. Other drops seemed to
coincide with the rise in the population of Coopers Hawks, which would indicate
loss by predation. Luckily we have recently seen
increases nationwide in kestrel numbers, but they seem to be a fragile species
in some areas.
These small falcons sometimes appear to hover in mid-air when hunting (photo: Gay Schroer)
Besides national studies,
which were instituted in recent years by the government and some universities,
the World Bird Sanctuary has noticed reductions in the number of American
Kestrels admitted to our wildlife hospital. This has taken place over a
number of years, so we thought we might
investigate.
We have many interns each
season at the Sanctuary who are assigned special projects as one of the goal of their internship, and we try to give them
interesting projects to do while they are here. Kim Sage was the intern chosen to research these yearly
fluctuations in kestrel admissions, not only at World Bird Sanctuary, but at
centers throughout the country.
Kim contacted fifteen centers
to see if they could dig through their files and see how many kestrels were
admitted in recent years. They
reported that admissions had fallen in most areas of the country, probably
meaning kestrel numbers dropped in that part of the country. In the Northeast kestrel admissions
were already starting to rise by the time we published our report in our Mews
News newsletter, and the other studies finished.
We still don’t seem to get
the historic numbers of kestrels at the hospital that we once did, but we admit
20 to 30 each year. Most of the
kestrels we receive at the World Bird Sanctuary Wildlife hospital are collision
victims, most likely hit by car or truck (or sometimes even trucks that might
be carrying cars). Another large
group is orphans.
These little Falcons seem
to be making a strong comeback, but you might not see them in the same areas
where we were accustomed to seeing them--by the highways.
On your next long car trip
watch in fields where the grass is short and you might see a little angel
hovering over the ground.
Submitted by Joe Hoffmann, World Bird Sanctuary Wildlife Hospital Manager
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