Boa constrictors are generally lighter in color
than pythons with a series of ovals separated by dark-colored,
saddle-shaped patches. The dark saddles usually have a light
spot on each side, and the light ovals tend to become darker and
often reddish colored toward the tail. The head is shaped similar
to a Burmese python's, but boas have a thin, dark wedge on the head
rather than a broad arrowhead. Boa constrictors typically reach
8-10 feet in length, although a few grow up to 13 feet.
There is considerable color and pattern variation
in boa constrictors. The red-tailed variety is popular in the pet
trade.
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Red-tailed boas have reddish patches towards the
tail
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The oval patches tend to turn darker towards the
tail.
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Boa constrictors have light-colored ovals
separated by dark, saddle-shaped patches.
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Burmese python head (left) showing dark arrowhead;
Boa constrictor head (right) showing thin line extending to
snout.
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