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
McCauley (1939:151) examined contents of 25 alimentary tracts of _E.
fasciatus_ collected in Maryland as the basis for the most extensive
account of the food habits yet published. One tract contained a broken
_Eumeces_ tail, possibly that of the lizard that ate it, which had a
recently broken stump tail. A half-grown skink contained numerous
_Eumeces_ scales, and McCauley interpreted this as indicating that it
had fed on another of its own species or of _E. laticeps_. As no other
hard parts of the assumed victim were in evidence, these scales may have
been the lizard's own slough. (In the present study it was found that
eating of the slough was far more frequent than cannibalism.) Arthropod
prey included: 11 orthopterans (4 undetermined, 3 unspecified
grasshoppers, 2 gryllids, 1 blattid, 1 acridid); 10 coleopterans (7
undetermined, 1 each of rhynchophoran, cerambycid, carabid, staphylinid
larva, elaterid adult and larva); 8 spiders; 5 pulmonate snails; 5
flies; 3 undetermined; and one each of lepidopteran larva and adult,
ant, dragonfly, thysanuran, and sow bug.
In Ohio, Conant (1940:31) noted food items consisting largely of
grasshopper nymphs and small beetles. He found that in captivity these
skinks would eat mealworms, crickets, grasshoppers, spiders, roaches,
and newborn mice, and a few individuals would lap egg from a mixture of
chopped meat and eggs. One large male killed and ate a small common
swift (_Sceloporus undulatus_). Netting (1939:162) mentioned newborn
mice, birds' eggs and small lizards as possible prey, although stating
that this species is mainly insectivorous.
Taylor (1936:61) describing the feeding habits of lizards of this genus
wrote: "The food consists of a very extensive variety of insects and
insect larvae, Arachnida and occasionally small crustaceans. In a few
specimens traces of plant material have been observed, but I regard this
as being most probably of accidental introduction in the diet. Probably
the most surprising fact about the diet of the forms examined is that
ants are absent." In the present study of _E. fasciatus_, the trends in
general bore out Taylor's findings concerning absence of ants from the
diet, although three ants were found among more than 600 other food
items. These three, one of them a larva, were of the two largest species
among the many kinds of ants found in the area of the study. Most of
these local kinds of ants are below the minimum size of prey ordinarily
taken by the skinks. Colonies of small ants, _Aphenogaster_ sp., for
instance, are abundant in the soil beneath flat rocks in the same
situations where the skinks are found, and constitute most of the food
of the small toads, _Microhyla olivacea_, which were abundant in the
same habitat and microhabitat as the skinks, especially in the Skink
Woods study area (Freiburg, 1951:383).
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