The observation of a greylag goose
in Watchemoket Cove in East Providence has birdwatchers rushing to the pond
adjacent to the Metacomet Country Club to try to catch a glimpse of the rare
species. But it has also caused an intense debate over whether it’s a wild bird
and, therefore, one that birders can add to their Rhode Island bird list.
Tan
and white birds with an orange beak and legs, wild greylag geese have only been
recorded in the United States a handful of times, including one record from
Connecticut in 2009. As a result, the small parking lot on Veterans Memorial
Parkway is often full as local bird enthusiasts search for the goose or wait
for it to arrive for its near-daily visits to the site.
Greylag goose with Canada geese, by Alan Strauss. |
Native
to Europe and Asia, the species has been domesticated and is sometimes found on
farms and in aviary collections. These birds occasionally escape captivity and
take up with their wild cousins, like the large flocks of Canada geese with
which the East Providence bird has been traveling.
The
debate over whether the local goose, which was first reported on December 20,
is wild or domestic will eventually be settled by the Rhode Island Avian Records Committee, but in the meantime, there is much discussion taking place
online about its origin.
On
the Facebook group Rhode Island Birders, Andy Boyce argued that there has been
an increasing and well-documented pattern of geese that breed in Greenland – greylags
breed in nearby Iceland – showing up on the northern coast of North America in
the late fall and winter. “This pattern is totally plausible given what we know
about errors that birds make during migration,” he wrote, noting recent New
England records of barnacle geese and pink-footed geese, which breed in eastern
Greenland. “There are very few accepted records of greylag goose…[but] this
certainly looks like a good one. Go out and see it!”
Dan
Berard, vice president of the Ocean State Bird Club, responded with a
1,000-word treatise acknowledging Boyce’s arguments and pointing out that the
East Providence bird looks “superficially” like a wild bird and it does not
have a band around its leg, which many domestic birds do. But he also wrote
that New England appears to have more escaped domestic waterfowl than other
regions, and greylag geese are less prone to wandering out of their normal range
than other geese.
“To
me,” he concluded, “nothing so far proves this to be more than a potential
vagrant greylag, and due to the ingrained migratory patterns, it is incredibly
unlikely.”
The
process of deciding whether the bird is wild or domesticated can be a lengthy
one. It took five years for the Avian Records Committee of Connecticut to issue
a decision about the greylag observed there.
The
Rhode Island Avian Records Committee – whose members are Robert Emerson, Rachel
Farrell, Richard Ferren, Shai Mitra, Chris Raithel, Scott Tsagarakis and Doug
Wilson – will gather photographs of the bird and send them to experts in Europe
who observe the birds regularly.
“The
question will be the bird’s provenance,” said Farrell. “We will never be able
to tell exactly where it came from. Unless someone gets a DNA sample, we’ll
never know that answer. But we’ll have to look at a lot of the circumstances --
where is it hanging out, what type of birds is it with. There’s a lot of work
to do.”
The
committee will also contact all of the known waterfowl collectors in the region
to see if they lost a greylag. Farrell said that many of the collectors are
often not particularly forthcoming with that information.
Rhode
Island often has wild geese from other parts of the world turn up in the
winter. Canada geese are common year round, and good numbers of brant – a
smaller and darker species that prefers coastal waters – spend the winter in
the state. A few snow geese, white birds with black wingtips, stop in the state
every year as they migrate from Canada to the Mid-Atlantic States. And birders
occasionally report a cackling goose, Ross’s goose or greater white-fronted
goose, all western species that often wander far from their usual range. In the
winter of 2007, seven species of geese could be observed on Aquidneck Island on
a single day, including three pink-footed geese and a barnacle goose.
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