For current postings on the Andover Lake blog regarding environmental issues, click here.
ALMA and the Wetlands Commission of the Town of Andover have adopted a joint letter to address the issue of water drafting on the lake. Any water removal from the lake requires approval from ALMA. This is to prevent invasive species to pollute our lake. The letter is here. Show it to any person, including state personnel, caught water drafting.
Drew Hyatt's Andover Lake Research page at Eastern Connecticut State University includes plenty of analysis of lake sediments as well as various mappings of the lake. It now also features neat virtual tours of the lake.
Things floating in the lake
We often notice strange things growing in our lake, and we are sometimes surprised to learn they have actually an earthly origin. We want to document some of them here, so watch for updates.
Connecticut River Bryozoans
(Pectinatella magnifica)
The colony is gelatinous, firm and slimy to the touch. The inner gelatinous mass is 99% water. The surface appears divided into rosettes, each with 12-18 zooids. Massive colonies may exceed 2 feet (60 cm) in diameter, although more typical sizes are 1 foot or less. The colonies form on submerged logs, twigs, even wooden docks.
Check out: Details at UMass Biology
A Bald Eagle was spotted on Andover Lake
Links to other wildlife common in or around Andover Lake:
The following information about Bald Eagles has been provided by the DEP:
BALD EAGLE Haliaeetus leucocephalus - Habitat:
Natural year-round habitat almost exclusively lakes, rivers or seacoasts.
- Weight: Males, 8-9 pounds; females,
10-14 pounds.
- Length: 34-43 inches.
- Wingspan: 6-7.5 feet.
- Life Expectancy: 25-30 years of
age.
- Food: Fish; also anything that
can be caught easily or scavenged such as waterfowl, small and large mammals,
and livestock carrion.
- Status: State endangered and federally
threatened.
- Identification: Adult bald eagles
have a snow-white head and tail, and a brownish-black body. The bill, eyes
and feet are yellow. Immature eagles are uniformly grayish-brown. The distinctive
adult plumage is attained at 4 to 5 years of age. The sexes are similar,
although the females are larger. Young bald eagles are often confused with
golden eagles; however, they are grayer than the darker golden eagle, and
the bill is much heavier.
- Range: The bald eagle nests from
Alaska and Newfoundland south to Baja California, the Gulf Coast and Florida.
It has recently returned to New England to nest. The greatest concentrations
of wintering bald eagles are found from November to March in the western
and Midwestern United States. Small concentrations of wintering eagles are
also found in New England during this same time period.
- Reproduction: Bald eagles breed
in northern New England and Canada between March and April. They use the
same breeding area, and often the same nest, each year. They reach sexual
maturity at 4 to 6 years of age. The nest, which sometimes measures 7 to
8 feet across, is a flat-topped mass of sticks, with a lining of fine vegetation
such as rushes, mosses, or grasses. It is built in trees, 10 to 150 feet
above ground. There are usually 1 to 3 (average 2) dull, white eggs in a
clutch. Both the male and female incubate the eggs and feed the young. The
time period between egg laying and fledging is approximately 4 months. The
entire breeding cycle, from nest construction to fledging of young, lasts
6 months.
- Reason for Decline: Bald eagle
populations declined because of human disturbance at nest sites; the loss
of waterside habitat due to human occupation; the loss of nesting trees;
intentional shooting by poachers; illegal trapping, mostly in the western
United States; and contamination of food sources, especially by pesticides,
with subsequent ill effects on health and reproduction.
- History in Connecticut: Up to
100 eagles winter in Connecticut from December to early March along major
rivers and at large reservoirs. This number is slowly increasing, but there
is still a challenge to reconcile human population growth and urban/suburban
sprawl with the specific needs of this endangered species. Bald eagles are
infrequently observed during the summer. For the first time since the 1950s,
a pair of bald eagles nested in Barkhamsted, Connecticut, in the summer of
1992 and produced 2 healthy chicks. The nest site in Barkhamsted continues
to be used by a pair of bald eagles; chicks have also been produced at a
new nest site along the upper Connecticut River, starting in 1997.
- Interesting Facts: The bald eagle
was first declared an endangered species with the passage of the federal
Endangered Species Act in 1973. However, due to the banning of DDT, success
of reintroduction programs through fostering of nestlings and hacking of
fledglings, habitat and nest protection measures and other efforts to restore
bald eagle populations, the U.S. Fish and Wildlife Service (USFWS) reclassified
the bald eagle from endangered to threatened in the lower 48 states in 1996.
While this reclassification does not alter conservation measures already
in force to protect the bald eagle and its habitats, it is a step closer
to the main goal of the Endangered Species Act, which is to restore endangered
and threatened plants and animals to the point where they are viable, self-sustaining
members of their ecosystems. Despite the reclassification of the bald eagle's
status by the USFWS, the species remains endangered in Connecticut.The bald
eagle's range is restricted to North America. It was officially adopted as
the national emblem of the United States of America on June 20, 1782. Eagles
are unable to carry much more than 4 pounds in flight. They kill prey by
grasping it with their strong feet and sharp talons. An eagles beak is used
solely for tearing flesh. The flight speed of a bald eagle ranges between
36 and 44 miles per hour. Despite their large size, eagles are disturbed
by unpredictable human activity, making delineated protection zones necessary
around areas of high eagle use. Since winter is a stressful time for eagles,
it is important that preferred winter feeding areas be protected. If these
birds are frequently disturbed from feeding and forced to travel to a different
area for food, their lives may be threatened. Adult birds are disturbed more
easily than juveniles.At night, wintering eagles often congregate at communal
roost trees; in some cases, they travel 12 or more miles from a feeding area
to a roost site. Roosts are often used for several years. Many roosts are
protected from the wind by vegetation or terrain, providing a favorable thermal
environment. Use of these protected sites helps minimize energy stress. In
addition, communal roosting may aid the birds in their search for food.
- Protective Legislation: Federal
- Endangered Species Act of 1973, Bald Eagle Protection Act of 1940, Migratory
Bird Treaty Act of 1918. State - Connecticut General Statutes Sec. 26-93
and Sec. 26-311.
- What You Can Do: Winter is a difficult
time for any wildlife species, including bald eagles. Food is harder to find
and cold temperatures cause energy stress. If you see a congregation of eagles
feeding or roosting, leave them alone and observe them from a distance. It
is also important to stay away from nesting areas to avoid disturbing the
birds. The Wildlife Division participates in a mid-winter eagle survey for
the United States Geological Survey; volunteers are always welcome to help
in this effort.