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I know, I know. Regular
readers of this series will be very curious to see how I am
going to stretch my oft-reiterated criteria for Arizona's
special species--species found only here or more easily here
than in any other state--to cover Three-toed Woodpecker.
Picoides
tridactylus can, after all, be found in ten other states
across the mountain west as well as eastward along the
Canadian border from the Great Lakes to New England.
But, throughout that range it is an uncommon and
nomadic bird, certainly never easy to find anywhere.
The answer lies in the nature of Nature.
Nature is not static.
Nature is dynamic and She abhors a vacuum.
Her agents of cataclysmic change--water, wind, and
fire--periodically create vacuums which She seeks immediately
to fill. I would
like this series and its criteria to be dynamic as well,
responsive to those natural events which affect and change our
state's avian life and how we relate to it.
At dusk on September 15, 2002 I stood in a small meadow in
the center of the Leroux Burn on the south slope of the San
Francisco Peaks outside Flagstaff.
Tapping was audible in every direction, subdued but
constant, so pervasive through the specter of blackened pines
it was spooky. Glassing
360 degrees without changing my position I counted eight
Three-toeds and three Hairy Woodpeckers, and I could hear
(yes, this is actually possible!) two different bark beetles
ratcheting away in their hidden catacombs nearby.
I was able to walk the perimeter of the Leroux Burn, which
occurred in June, 2001, in a couple hours.
As forest fires go, Leroux would be merely a postage
stamp on the vast face of last year's Rodeo-Chediski fire
which would take days to explore by auto.
You can see where I'm going with this, and the Engraver
Beetles are already there, some predating the fire, others
having followed the smell of the burning wood chemicals to the
smoke’s source.
No one is quite sure how Three-toeds find a fire site, but
congregate they do, most likely settling in and raising larger
broods wherever their nomadic wanderings intersect with
concentrations of their beetle prey.
Beetles will be at their peak in the Rodeo-Chediski
this summer and next. Three-toeds
will be too, and they should be easy to find with a little
diligence.
Picoides
tridactylus is one of our rare species actually named scientifically and
commonly for an outstanding physical
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characteristic. Like
Black-backeds they lack the inner rear toe of other
woodpeckers and, though theydo excavate into the wood for
their nest holes, they flake bark rather than excavate when
foraging, wood-boring beetle larva being the dietary staple.
The handful of nests I have found have all been at eye
level in blackened snags of burned out pine, and the nest
holes have had extensive areas of flaked bark around them.
In Arizona Three-toeds and Hairies are found in the same
habitat, but Three-toeds are always quieter and less active
than the latter, and will allow much closer approach, often
seeming quite tame. Outside
of breeding season, mated pairs can be found together
maintaining vocal contact and exchanging food items as they
feed through an area. I
was once privileged to watch a family of four working a burn
in Alaska, the adult male "teaching" a juvenile
male, the adult female, a juvenile female, the young birds
obviously going through trial and error trying to duplicate
the parents' flake and forage techniques.
The Three-toed's contact call is a typical woodpecker "pik"
reminiscent to me of a Ladder-back or the alarm call of an
American Robin. It
is deeper and more resonant than that of a Downy, but much
softer and lower than that of a Hairy.
Three-toeds are clinal across their range in the U.S.,
our Arizona population being part of the dorsalis
race, the lightest overall with the least barring on its white
back. At first
glance, females of Three-toed and Hairy can be confused, but
Three-toeds will always have barring on the flanks whereas
Arizona Hairies are all white below giving a much
"cleaner" appearance. The drumming of these two species reflects their
personalities. The
Three-toed's is rather soft and deliberate, almost tentative
compared to the louder, faster beat of a Hairy.
Prior to our state's recent fires the best places to find
Three-toeds in Arizona were the Sunrise Campground off state
route 260 between Pinetop and Greer, and on the Apache-Sitgreaves
National Forest around Hannagan Meadows along U.S. 191 south
of Alpine. The
accompanying photo was taken in September, 2002 in the Leroux
burn, certainly a recent hotspot created for this species by
dynamic and unforeseen natural forces.
For the next three years the vast Rodeo-Chediski
footprint may well be the easiest place in the country to find
this much sought, retiring yet tame, fire and infestation
specialist of the north woods. |