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Upper Valley birders - I want to follow up the recent posts and
expressions of concern about the two loons that were "trapped" in an
open lead on icebound Lake Morey. This has been indeed a distressing
situation, although one that occurs annually during the period of
freeze-up on northern lakes. It creates a complicated dilemma for us
humans wishing to intervene.
Many of you know that the Vermont Center for Ecostudies (VCE), in
long-term partnership with the Vermont Fish and Wildlife Department
(VFWD), coordinates the statewide monitoring and protection of
Vermont's breeding loons. You can learn more at our web site:
http://vtecostudies.org/projects/lakes-ponds/common-loon-conservation/.
VCE's Loon Biologist Eric Hanson is based in Craftsbury, but covers
the entire state, which has become more challenging as Vermont's
population has increased from a low of 8 nesting pairs in the
mid-1980s to 87 this past summer. Eric, who technically is employed
by VCE for only 6 months each year (roughly April through October),
has spearheaded numerous loon "rescues" over the years and was made
aware early on of the situation on Lake Morey. He and I communicated
earlier today, and I have distilled some of his thoughts below.
Rescuing a loon from an open patch of water surrounded by ice is
tricky, to say the least. VCE and VFWD do have a protocol to guide
our actions so that any rescue is performed in a safe manner. More
often than not, loons actually can take off from small openings of
30-100 feet. We've documented two such cases already this year. If
the hole becomes too small for a take-off attempt, we usually wait
for the hole to freeze over and then walk out and retrieve the loon
- a dangerous process that requires extreme care. A loon swimming
in an opening can often keep the water open for a week or more,
allowing time for the surrounding ice to thicken and become safe for
humans. According to the Tufts Wildlife
Clinic, a loon can survive 1-2 weeks without much food and so
might not need to feed while trapped in the
opening. Monitoring is crucial to determine when to try to venture
out on the ice. If we the bird is captured and in reasonable
health, then it will be transported to a long-term open water area,
such as Lake Champlain or a coastal site (nearly all loons
overwinter in nearshore coastal waters), and released. If a captured
loon is injured, sick, weak, or otherwise compromised physically, it
would be brought to VINS for rehabilitation.
In Eric's nearly 20 years as VCE's Loon Biologist, he has performed
6 ice rescues and monitored dozens more. In most cases, we believe
the birds were able to take off, although some may have drowned, as
has been suggested one of both of the Lake Morey loons. For these
two birds, VCE was monitoring the situation (with help from several
of you), and VFWD game warden Jeff Whipple was ready to help when
the time came to attempt a rescue. We follow similar protocols to
the Loon Preservation Committee
in NH. In this case, the presence of nearby eagles obviously made
the loons dive more than in most other situations Eric has observed,
when trapped loons tend to stay put and dive very little. With
yesterday's warm weather and rain, there is a chance, maybe remote,
that the remaining loon was able to take flight on watery ice
surface. Eric reports that this happened about 10 years ago on Lake
Morey.
I hope this allays some concerns that inadequate action was taken on
the behalf of the two Morey loons. It would not have been feasible,
or prudent, to include the listserve on all e-mail traffic that
occurred between Eric Hanson and VFWD game warden Jeff Whipple, but
rest assured that the situation was being monitored closely. We
sincerely appreciate the individuals who drew attention to this
situation, and we can only hope that the second bird made it safely
off the lake. This is an age-old problem for loons, especially in a
winter like this one when more birds than normal may be induced to
linger further north, then a dramatic cold snap like last week's
causes a sudden freeze-up. Some individuals make it, some don't. It
certainly helps to have so many concerned eyes keeping track!
Chris
--
Chris Rimmer
Vermont Center for Ecostudies
P.O. Box 420
Norwich, VT 05055
802-649-1431 ext. 1
www.vtecostudies.org
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