Abundant prey draws raptors
Looking down on bald eagles is a unique experience.
Black bodied with white heads and tails, the magnificent
bird's 72-inch wing span makes it look like a painted
B-42 bomber. During a recent waterfowl survey, we saw
many eagles on American Falls Reservoir scouting out a
duck dinner. One eagle was standing on a dead goose
eating and enjoying its meal.
Bald eagles have passed the
word: Hunting and fishing are excellent on the Snake
River from the South Fork to American Falls Reservoir.
Bald eagles from as far away as Canada and Montana are
sharing hunting and fishing spots and perches along the
Snake River.
One of Fish and Game's jobs is to count the
concentration of wintering eagles for the national
survey conducted in January. Information gathered on the
flight provides a small piece of an intricate puzzle of
what is happening to bald eagles.
This year,
biologists counted 108 bald eagles from Idaho Falls to
Massacre Rocks State Park along the Snake River. Over
all, bald eagles have done well. State wide a record 925
wintering birds were recorded in 1994, up from 404
surveyed in 1979. Better yet, bald eagles successfully
nesting in Idaho has dramatically increased since
surveys started in 1979; in 1979 only 11 nesting
territories were occupied with eight being successful.
In 2003 there were 147 occupied territories, with 103
being successful.
Three spots in Idaho hold the majority of bald eagles:
Northern Idaho, Adams and Washington counties and the
Idaho Falls-Pocatello area along the Snake River.
Migrating
eagles are drawn to eastern Idaho and the Snake River to
hunt ducks, geese, suckers and whitefish. Eagles watch
from perches or cruise in effortless flight, looking for
ducks or geese that are weak or crippled. Spotting a
likely meal they swoop in trying to flush the bird off
the water or ice.
Healthy ducks and geese scatter to the wind when hunting
eagles get close. The crippled or weak birds try to dive
or half fly and run to flooded willows for cover. Few
cripples escape the eagle's talons.
Looking down,
we watched two eagles sitting on the ice not 100 yards
from a mass of mallards. A third eagle flew directly
over the ducks, and pandemonium broke loose. The sitting
eagles homed in on a crippled duck that didn't leave
with the rest. The chase was swift - a few twists and
turns and the crippled mallard was caught and killed.
Benjamin Franklin called eagles disreputable
"A thief, a
scavenger, a bird unfit to be our nation's symbol," was
how Benjamin Franklin described the bald eagle in the
debate over the national symbol. Franklin favored the
wild turkey.
The bald eagle won out, and now we don't have a national
bird traditionally eaten for Thanksgiving dinner.
Bald eagles
faced a troubled future in the new nation. Populations
declines were traced to the widespread use of DDT, which
caused egg-shell thinning, and bald eagles ended up on
the Endangered Species List. Once on the verge of
extinction in the lower contiguous 48 states, bald
eagles have made a dramatic comeback. They were recently
down listed from endangered to threatened.
They are travelers and opportunists. Tag returns show
some eagles migrate from Canada to Texas, dining along
the way on the most available fish or fowl. Eagles
eating ducks and white fish along the Snake River today
may be cruising fields for stranded rodents or eating on
a road killed deer carcass tomorrow in Utah. If cold
weather moves waterfowl southward, so go some of the
eagles.
Where to eagle watch
The Henrys Fork of the Snake River all the way down to
the Fish and Game Access area near Tilden Bridge are
good places to spot eagles. Several access sites are
located on the north side of the Snake River below
Blackfoot. Eagles perch and cruise up and down this
section of the Snake River. Eagles are currently
congregated along the south side of the reservoir where
the Portneuf River flows in and on the east side of the
reservoir where the Snake River flows in.
Wolf Lodge Bay on Coeur d'
Alene Lake is one of the best places in the state to
watch eagles. The annual kokanee salmon run congregates
thousands of spawning 14-20 inch salmon for the eagles
to feed on. Tour boats are available for a fee.
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