[Ontbirds] Detroit River Hawk Watch (10 Sep 2016) 44 Raptors

reports at hawkcount.org reports at hawkcount.org
Sat Sep 10 17:49:07 EDT 2016


Detroit River Hawk Watch
Brownstown, Michigan, USA
Daily Raptor Counts: Sep 10, 2016
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Species            Day's Count    Month Total   Season Total
------------------ ----------- -------------- --------------
Black Vulture                0              0              0
Turkey Vulture               0            163            163
Osprey                       0              5              5
Bald Eagle                   1             17             17
Northern Harrier             0             66             66
Sharp-shinned Hawk          13            500            500
Cooper's Hawk                0              8              8
Northern Goshawk             0              0              0
Red-shouldered Hawk          0              0              0
Broad-winged Hawk            0            325            325
Swainson's Hawk              0              0              0
Red-tailed Hawk              0             30             30
Rough-legged Hawk            0              0              0
Golden Eagle                 0              0              0
American Kestrel            27            126            126
Merlin                       3              6              6
Peregrine Falcon             0              0              0
Unknown Accipiter            0              1              1
Unknown Buteo                0              0              0
Unknown Falcon               0              1              1
Unknown Eagle                0              0              0
Unknown Raptor               0              5              5

Total:                      44           1253           1253
----------------------------------------------------------------------

Observation start time: 07:00:00 
Observation end   time: 15:00:00 
Total observation time: 7 hours

Official Counter:        Don Sherwood

Observers:        Andrew Sturgess, Dustin Brewer

Visitors:
Thanks to Paul and Jim for stopping by!


Weather:
Today was mostly cloudy with some very brief showers. Even when sunny at
the count site, it was often cloudy and/or rainy to the west over Canada,
which may have deterred many birds from migrating. Flying without thermals
(which are uprising air columns caused by solar energy) and being wet make
for less than ideal traveling conditions. 

Raptor Observations:
Falcons (birds in the taxonomic genus Falco) were most common today.
Specifically, the erratically-flapping American Kestrels were moving in
greater numbers, with the solitary and fast Merlins moving through in
smaller numbers. 'Sharpies' (Sharp-shinned Hawks) were also relatively
common today. These bird species were probably better-suited to fly in
today's weather conditions than Broad-winged Hawks, which depend more on
soaring.

Non-raptor Observations:
Don spotted at least four Ruby-throated Hummingbirds today, likely headed
southwards to ultimately cross the Gulf of Mexico, where they will
overwinter in Central America. These ~4 gram birds can travel up to 600
miles without re-fueling, according to one study, after packing on fat
before migration. Talk about fuel efficient! We also saw a group of five
American Wigeons migrating through the area.

Predictions:
Tomorrow is predicted to be clear and sunny, so hopefully the birds that
did not fly today will move through tomorrow!
========================================================================
Report submitted by Detroit River Hawk Watch (greg_norwood at fws.gov)
Detroit River Hawk Watch information may be found at:
http://www.drhawkwatch.org 






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