Tuesday, September 25, 2007

Hawk Migration: peak numbers and migration times

I decided to start re-reading archived issues of the Ontario Field Onithologists Newsletter and the first issue I picked up, dated October of 1999 has an in-depth article on hawk migration. Perfect supplement for my last post. The article is written by Ron Pittaway and contains much important information.

Here's a list summarizing the migration periods of each species as well as peak numbers (late dates in brackets following migration periods) taken from the article:

Turkey Vulture

Migration periods: mid-September to mid-November (rare winter)
Peak numbers: early to mid-October

Osprey

Migration: mid-August to late October (early December)
Peak: early to mid-September

Bald Eagle

Migration: September to December (rare winter)
Peak: September (numbers always low)

Northern Harrier

Migration: late August to late November (winters)
Peak: September

Sharp-shinned Hawk

Migration: late August to late November (winters)
Peak: September

Cooper's Hawk

Migration: mid-September to early November (rare winter)
Peak: early to mid-October

Northern Goshawk

Migration: early October to late November (winters)
Peak: late October to early November

Red-shouldered Hawk

Migration: early October to mid-November (rare winter)
Peak: mid to late October

Broad-winged Hawk

Migration: late August to early October (early November)
Peak: mid-September

Swainson's Hawk

Migration: early September to late October
Peak: mid-September to mid October (very rare migrant)

Red-tailed Hawk

Migration: mid-September to early December (winters)
Peak: mid-October to early November

Rough-legged Hawk

Migration: early October to early December (winters)
Peak: late October to early November

Golden Eagle

Migration: late September to December (rare winter)
Peak: late October to early November

American Kestrel

Migration: late August to mid-November (winters)
Peak: September

Merlin

Migration: late August to early November (rare winter)
Peak: September

Peregrine Falcon

Migration: early September to late October (rare winter)
Peak: late September to early October

Here's what he has to say about High Park:

"This fabulous site in Toronto's famed High Park is in the city's west end between the Gardiner Expressway and Bloor Street. Go to parking lot of Grenadier Restaurant from Bloor Street via West Road or take the east entrance off Parkside. Note: On Sundays and holidays from 1 May to 1 October, vehicle entrance to High Park is from Bloor only. Hawks are viewed from the small knoll known as Hawk Hill just to the north of the restaurant. High Park offers excellent birding throughout the year."

I have been there a few times now and I agree with the last statement. I'm looking forward to attending one of their hawk counts soon.

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