[Ontbirds] Detroit River Hawk Watch (29 Sep 2016) 4 Raptors

reports at hawkcount.org reports at hawkcount.org
Thu Sep 29 17:10:47 EDT 2016

Detroit River Hawk Watch
Brownstown, Michigan, USA
Daily Raptor Counts: Sep 29, 2016

Species            Day's Count    Month Total   Season Total
------------------ ----------- -------------- --------------
Black Vulture                0              0              0
Turkey Vulture               0           1119           1119
Osprey                       0             18             18
Bald Eagle                   0             52             52
Northern Harrier             2            221            221
Sharp-shinned Hawk           2           2477           2477
Cooper's Hawk                0             43             43
Northern Goshawk             0              0              0
Red-shouldered Hawk          0              1              1
Broad-winged Hawk            0          17396          17396
Swainson's Hawk              0              0              0
Red-tailed Hawk              0            131            131
Rough-legged Hawk            0              0              0
Golden Eagle                 0              0              0
American Kestrel             0            478            478
Merlin                       0             17             17
Peregrine Falcon             0              4              4
Unknown Accipiter            0              3              3
Unknown Buteo                0              8              8
Unknown Falcon               0              2              2
Unknown Eagle                0              0              0
Unknown Raptor               0             11             11

Total:                       4          21981          21981

Observation start time: 07:00:00 
Observation end   time: 11:00:00 
Total observation time: 3 hours

Official Counter:        Dustin Brewer

Observers:        Andrew Sturgess

Our only visitors today were two hungry ducks, Splish and Splash.

This morning, clouds to the southeast appeared bright blue, as if a wavy
disturbance in a tropical bay. The wind was variable in direction and
strength, as if the the weather system moving through couldn't 'make up its
mind.' The rain was also unpredictable, starting and stopping throughout
the morning. It rained throughout most of the afternoon, which stopped the
count early.

Raptor Observations:
We observed only two Northern Harriers and two Sharp-shinned Hawks today,
due to the weather. Even when it was not raining at the count site, it was
often raining in Canada on the migration route. Birds in the past who tried
to go through such weather or didn't have the capacity to perceive its
presence probably often died, and didn't pass on genes that made them more
likely to fly in the rain. Thus, few birds migrating today.

Non-raptor Observations:
We got to see a ball of about 10 starlings mirroring the movements of our
local Cooper's Hawk, flying just above its head. This behavior was very
interesting to watch, and may ultimately decrease the hawk's hunting
success, making it more likely to die or move on, and therefore creating a
safer environment for starlings. Even the Blue Jays weren't moving today,
as we only counted 200. About 100 Red-winged Blackbirds flew overhead, and
25 Pie-billed Grebes are still hanging around in the water. 

Tomorrow is also predicted to be rainy, but there may be breaks in the rain
long enough to see some migrants.
Report submitted by Detroit River Hawk Watch (greg_norwood at fws.gov)
Detroit River Hawk Watch information may be found at:

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