Well, the birds fly south in the fall, so they must fly north in
the spring, right? Yes! However, they are not found at Hawk Ridge in
the spring because of its location on the NORTH side of Lake
Superior. Instead, the SPRING COUNT takes place further to the
southwest, although still in Duluth. Here's the skinny on the spring
migration: The count starts toward mid-March and continues
DAILY through the end of May. Timing of species, as you can imagine,
is the reverse of what it is in the fall. The first arrivals in the
spring are the EAGLES, both bald & golden, and ROUGH-LEGGED HAWKS.
Not long after that the RED-TAILED HAWKS arrive. BROAD-WINGED HAWKS
and SHARP-SHINNED HAWKS begin showing up in April.
Here's the peak for each species (high counts
listed):
Eagles: around March 25 (Bald: 400-500/day; Golden: 10/day)
Rough-legged Hawks: April 10-20 (up to 75/day)
Red-tailed Hawks: April 10-20 (1,000-2,000/day)
Broad-winged Hawks: May 1-10 (3,000-4,000/day)
Sharp-shinned Hawks: April 10-20 (up to 450/day)
Raptors flying north through our area in the spring are a little
more spread out...we don't have as great of a natural funnel for
northward migration as we do at Hawk Ridge for the southward
migration in the fall. In the spring, smaller birds such as
Sharp-shinned Hawks and American Kestrels tend to stay down along
the shore, out of range of our counters. The Northern Goshawk route
is a bit of a mystery for now, our highest number for
goshawks in
one day during the spring is four.
What about weather? SOUTH or SOUTHWEST winds are best for big
numbers of northward migrating raptors. I am happy to report
this--these are usually days with beautiful weather! WEST winds are
also good, and the counters report that there are birds "on any
wind". Birds are on a mission now: Get To Nesting Territories!, so
they're not taking their time waiting for perfect migrating weather.
Numbers are, however, greatly reduced in inclement weather such as
fog, snow, rain, sleet, or hail.
Another spring advantage? GREAT looks! The cold ground doesn't
promote the development of huge thermals, so the birds are generally
much lower, riding updrafts along the ridge instead. The ground
doesn't warm up until late May, so until then the birds will be
quite low. Dave, the counter,
has reported Bald Eagles within 40 feet of him, riding the
updrafts!
WHERE is the spring count? Good question! The answer, my friend,
is blowin' in the wind.
In S, SW, SE, N, NW or W winds: Enger Tower. Directions: From
I35N, take the Mesaba Ave Exit in Duluth, and follow Mesaba to a
left turn onto Skyline Parkway before Central Entrance. Continue on
Skyline to a pullout overlook just below Enger Tower. (You'll come
to the Enger Golf Course if you go too far) If you don't see anyone
there with binoculars, try the Thompson Hill site.
In NE or E winds: Thompson Hill. Directions: On I35S from Duluth,
take the Boundary Ave exit. Take the immediate left onto West
Skyline Parkway as if going to the Thompson Hill Rest Stop. Drive
past the first rest stop entrance to the overlook directly below the
rest stop. (You'll come to the second rest stop entrance if you go
too far)
What ACTIVITIES are going on during the spring count? For now,
counting is the only activity taking place. Unless they're busy, the
counters will be able to point out "viewable" birds. It can be a
great time, especially for those not new to hawkwatching. If you're
a complete beginner, however, I highly recommend visiting Hawk Ridge
during the fall to take advantage of the knowledge of the volunteers
and naturalists.
Click here to keep an eye on the spring count numbers.
The numbers are updated on a regular (usually
daily) basis.