Life History and Ecology of the Five-Lined Skink, Eumeces fasciatusFitch, Henry S. (Henry Sheldon)
Science
Life History and Ecology of the Five-Lined Skink, Eumeces fasciatus
Fitch, Henry S. (Henry Sheldon)
Eumeces fasciatus
Barbour and Carr (1940:129) wrote of _inexpectatus_ in the vicinity of
Miami, Florida: "... it seems to be the only one [of the five-lined
skinks] which has adapted itself to life under the rather specialized
environmental conditions existing in its rocky and decidedly tropical
habitat. It is one of the very few forms which have established
themselves on some of the waterless and poorly vegetated islands on both
coasts of the peninsula. _E. inexpectatus_ is much less arboreal than
either _laticeps_ or _fasciatus_. Although it climbs trees when pressed,
it is usually found on the ground among leaves or about fallen logs, and
particularly about stone walls or old buildings made of cut rock."
On the other hand, Neill (1948a:157) states that in Georgia,
_inexpectatus_ is often observed basking on tree trunks, and though
adults often forage on the ground, they dash for the nearest tree when
disturbed, usually climbing to a considerable height before halting. The
juveniles, however, are said to climb only rarely; they hide beneath
objects on the ground when they are pursued. Neill stated that _E.
inexpectatus_ occurs in dry pine forests where _laticeps_ and
_fasciatus_ are lacking, as well as in moist or even swampy woods. _E.
inexpectatus_ often forages on the sides of old buildings.
Hoffman (1953:172), in discussing means of differentiating between
_inexpectatus_ and _fasciatus_ in Virginia, states that there are ample
differences in color and behavior as well as in scalation. He describes
the color difference (blue color of tail of juveniles extending
anteriorly beyond pelvis; light stripes reddish-orange on head,
sublateral line present, in _inexpectatus_) but he does not describe the
differences in behavior. He states that _inexpectatus_ is the most
abundant lizard in southeastern Virginia. Carr (1940:76) also states
that _inexpectatus_ is less arboreal than _laticeps_ and is often found
under logs and boards in dry sand.
_E. inexpectatus_ thus seems to be adapted to a somewhat drier, more
open, habitat than that typical of _fasciatus_, but it is not clear
whether either species is more arboreal in habits. It is to be hoped
that the present inconclusive summary will draw attention to the problem
and will lead to more critical comparisons of the habitats and behavior
of the two species by herpetologists in the southeastern states. The
differences, both ecological and morphological, that distinguish
_inexpectatus_ from _fasciatus_ are of a degree usually found between
subspecies of the same species. The extensive geographic overlap between
them is indeed remarkable in view of the slight degree of
differentiation, morphologically and ecologically. They are, however,
complementary in part in their ranges, while _laticeps_ shares all parts
of its range with either one or the other, or both of them (see Figures
4 and 5).
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