HSR: Holiday Beach (21 Oct 2002) Raptor counts (total=1065)

reports at hawkcount.org reports at hawkcount.org
Mon Oct 21 23:06:17 EDT 2002

Holiday Beach Migration Observatory
Essex County, ON, Canada
Daily Raptor Counts: Oct 21, 2002

Species            Day's Count    Month Total   Season Total
------------------ ----------- -------------- --------------
Turkey Vulture             722          16163          16393
Osprey                       0             30            102
Bald Eagle                   3             16             26
Northern Harrier             5            274            525
Sharp-shinned Hawk          76           3223           6762
Cooper's Hawk               18            213            261
Northern Goshawk             6             15             19
Red-shouldered Hawk         24            101            105
Broad-winged Hawk            0             11           4884
Red-tailed Hawk            206            670            749
Rough-legged Hawk            0             11             11
Golden Eagle                 1              9             10
American Kestrel             4            726           1997
Merlin                       0             24             89
Peregrine Falcon             0             37             53
Unknown                      0             28             40

Total:                    1065          21551          32026

Observation start time: 07:00:00 
Observation end   time: 16:00:00 
Total observation time: 9 hours

Site Coordinator: Nancy Tar

Observers:        Doris Applebaum, Mike Forton

one visitor today - Mike Forton- who helped us count

Starting at -1 celcius, ending at 7 C low winds starting from the N ending
from the S. Sunny and partly cloudy, clear visibility all day

Golden eagle at 1:15 pm, this was a textbook 2nd year sub adult, used
Sibley's for reference, and had the scope on it,  Today seemed to be a day
for goshawks even though the winds were slight and wrong.

We have been concerned about the population of crows due to the absence of
crows in Oakland county from the West Nile virus, today we had 8,660
crows.  Blue jays are also a concern, last week we had several thousand,
today we only had 652.

Rain is predicted
Report submitted by Jason Sodergren (jason at taiga.com)
Holiday Beach Migration Observatory information may be found at:

Holiday Beach Migration Observatory

Information on southern Ontario\'s hawk migration and the Holiday Beach
Conservation Area site

Southwestern Ontario is largely an area of flat, featureless farmland. There
are only two geographic features of note in the region. One is the proximity
of the Great lakes, which influence bird migration in the area to a great
extent, The second is the shape of the province, roughly funnel-shaped with
the narrow end to the southwest. These features confine south-bound bird
migrants, especially hawks, to specific flight corridors.

Holiday Beach Conservation Area was formerly a Provincial Park, but is now
administered by the Essex Region Conservation Authority (ERCA). It is
strategically located at the extreme southwestern tip of southern Ontario.
The park is on the eastern end of a large freshwater estuary known as Big
Creek. (Specifically the site is 1.1 miles south of the junction Highway 20
(old 18) and Essex Road 50, Town of Amherstburg).

The Holiday Beach Migration Observatory (HBMO) (founded in 1986) is a
non-profit, volunteer organization formed to promote the study and
protection of migrating birds. Activities focus primarily on fall migration
of raptors and other species. This site is in Essex County, Ontario, on the
north shore of Lake Erie near the Detroit River. In 1988, HBMO persuaded
Detroit Edison to donate a 40 foot Hawk Tower which is now at the site.

Southwestern Ontario has a funneling effect on migrating raptors due to the
geography of the nearby lakes and the reluctance of most raptors to cross
large bodies of water. Birds gain altitude over the flat farmland to the
north and east, rising easily with the thermals that such areas provide in
abundance. As the birds head south they meet Lake Erie and, reluctant to
cross it , turn west. With appropriate wind and weather conditions, birds
pile up along the lake shore and move west until they reach the narrow
crossing at the Detroit River (or island hop within the river mouth).

reports at hawkcount.org

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