The two-acre quarry pond in Halibut Point State
Park, being so close to the ocean shoreline, often hosts gulls and cormorants.
The gulls come primarily for rest and fresh-water bathing. They're
talkative and argumentative. We can imagine a social, newsy, kibitzing
dimension to their gatherings. For cormorants the main draw seems opportunistic. They pursue fish.
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Grebe and
cormorant on the quarry pond |
One day last month an entirely new bird appeared on
the pond, small and mousy except for its boldly striped bill. That feature
identified it as a Pied-billed Grebe. It stayed about a week. Being a pescivore
like the rest of the grebe clan, it dove frequently beneath the surface to
seek a share of the cormorant's minnowy mainstay.
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The
Pied-billed Grebe |
Most mornings the grebe could be spotted as an
unspectacular but fascinating novelty on the pond. Sometimes, confoundingly, it
disappeared for long spells without flying away. Cornell University's Ornithology
Lab calls it 'part bird, part submarine' with this description on their website:
Pied-billed Grebes
can trap water in their feathers, giving them great control over their
buoyancy. They can sink deeply or stay just at or below the surface, exposing
as much or as little of the body as they wish.
So perhaps it was there all along, submarining.
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The
Pied-billed Grebe's remarkable foot |
While preening and stretching the grebe reveals
that its outsized leg and foot are equal in length to its entire body. The enormous
lobed toes that distinguish grebes from other ducks enable strong propulsion as
well as great maneuverability. The thighs and 'drumsticks' powering those paddles
from beneath the feathers must be unusually muscular.
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The grebe
stretching its wings |
Grebes get where they want to go primarily by
swimming. An anatomical tradeoff has shifted their strength from wings to legs.
I never saw this one fly.
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A serene
moment |
The grebe's original arrival and final departure
from the quarry happened through the air, unobserved. Whatever its own business here
it provided another interesting focus in the ongoing diversity of life at
Halibut Point.
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Red-necked
Grebe on the quarry |
Several winters ago this cousin of the Pied-billed
Grebe made an extended stay at the quarry.
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The
Red-necked Grebe with a fish |
That bird seemed to be fishing successfully in the
pond, but like the Pied-billed Grebe, it didn't take up long-term residence.
Quarry life in the Park didn't suit it.
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A Red-necked
Grebe offshore in winter plumage |
During winter Red-necked Grebes can occasionally be
seen along our rocky shore in their customary salt-water habitat. Like loons,
they exhibit subdued grayish plumage at that time of year. Until this week I'd
never seen one in the striking breeding-season coloration that inspires its
name.
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A Red-necked
Grebe in breeding plumage |
The Red-necked Grebe's elegance at mating time captures
the eye both of potential suitors, and of any observer fortunate enough to see
sunlight glinting from its transformed feathers and refined silhouette.