Natural History of the Ornate Box Turtle, Terrapene ornata ornata AgassizLegler, John M.
Science
Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz
Legler, John M.
Ornate box turtle
Although published information on _T. ornata_ is scant, a considerable
amount of information is available concerning its congener, _T.
carolina_. The classic studies of Stickel (1950) on it constitute the
most complete account of populations and movements for any reptile or
amphibian, and probably, for any vertebrate. She found the average
home range of adults to be 350 feet in diameter. Home ranges were not
defended as territories and nearly all individuals were socially
tolerant of one another. Movements (studied by means of a
thread-trailing device) were characterized by frequent travel over the
same routes within the home range. Some turtles concentrated their
activities in only one part of the home range, moving subsequently to
another part, and some turtles had two ranges between which they
traveled at varying intervals. Females ordinarily left their home
ranges to nest.
Other noteworthy, but less detailed, studies of populations of _T.
Carolina_ are those of Breder (1927) who found evidence of home range
and homing behavior, and of Nichols (1939b) who, after observing a
marked population on Long Island over a period of twenty years, found
evidence of homing behavior and estimated normal home range to be
approximately 250 yards in diameter. Numerous shorter papers such as
those of Schneck (1886) and Medsger (1919) document the tendency of
_T. carolina_ to remain in restricted areas over long periods.
Important studies that indicate the presence of home range and homing
behavior in other chelonians are those of Cagle (1944) on _Pseudemys
scripta_ and _Chrysemys picta_, and of Woodbury and Hardy (1948) on
_Gopherus agassizi_. Grant (1936) and Bogert (1937) have also
indicated that movements of individuals of _Gopherus agassizi_ are
restricted to limited areas.
Locomotion
Ornate box turtles moving forward over even terrain hold the plastron
a quarter to a half inch above the ground and keep the head and neck
lowered and extended. Each foreleg is brought forward and the humerus
points nearly straight ahead when the foot touches the ground. Nearly
all of the palmar surface is initially in contact with the ground but
as the body is brought forward and the humerus swings outward, only
the claws, and finally, only the two inner claws are in contact with
the ground. Of the hind feet, the medial surfaces are the principal
parts that touch the ground but some traction is derived from the hind
claws at the beginning of each cycle of the hind leg. Under normal
conditions, box turtles move slowly and pause to rest and examine
their surroundings every few feet. When resting, the plastron is in
contact with the ground, the legs relaxed, and the head and neck are
extended upward. Some turtles seeking shelter from the heat of
sunshine walk rapidly for a hundred feet or more without pausing.
Public-domain text, read in full here on John Shaqi.
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