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Spotted Salamander (Ambystoma maculatum)
Description:
Gray-brown to blue-black. Two irregular rows of yellow spots on
each side. Undersides are lighter, typically slate gray. Adults
are six to eight inches long.
Distribution and Status:
Spotted salamanders occur throughout New England, the Great Lake
States, the southeastern United States (except Florida), and Atlantic
Canada. In Maine, the species has been reported most frequently
in central Maine.
Terrestrial Habitat
and Hibernation: Spotted salamanders are found in deciduous,
mixed, and softwood forests, and on some occasions in open fields.
The majority of the time is spent below ground, commonly in shrew
or other small animal burrows. They seek refuge under leaf-litter
and coarse woody debris. Adults feed on forest-floor invertebrates
including earthworms, snails, spiders, and insects. Home ranges
vary from as little as one square meter up to 40 square meters.
Spotted salamanders hibernate in upland forests most commonly below
ground in burrows created by small mammals or tree roots.
Breeding Pool:
Spotted salamanders preferentially breed in temporary to semi-permanent
vernal pools free of fish. They may also breed in beaver flowages,
lakeshores, and human-made pools (roadside ditches, borrow pits,
skidder ruts). The artificial pools, that tend to be more numerous
in many areas, are also usually much less suitable for the survival
of larvae. Pools used exclusively by spotted salamanders tend to
be warmer, less murky, and in more open sites that those used by
blue-spotted salamanders.
Egg Masses:
Number of eggs per mass is usually between 100 and 150. Masses with
fewer or more eggs do occur. They are normally attached to twigs
or plant stems several inches below the surface of the water. The
color of the jelly casing varies from clear to milky white, and
is sometimes green from algae. The consistency of the gelatinous
envelope surrounding the entire egg mass is like jello. Individual
eggs are dark brown or gray above and lighter below.
Larvae: Dull
greenish, chin and throat without markings, head broad and blunt,
wider than body.
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