1.
Almost half of the world’s chameleon species live
on the island of Madagascar, with 59 different species existing nowhere
outside of the island. There are approximately 160 species of chameleon. They
range from Africa to southern Europe, and across south Asia to Sri Lanka. They
have also been introduced into the United States in places such as Hawaii,
California and Florida.
2. Chameleon eyes have a
360-degree arc of vision and can see two directions at once.
Chameleons have the most
distinctive eyes of any reptile. Their upper and lower eyelids are joined, with
only a pinhole large enough for the pupil to see through. They can rotate and
focus separately to observe two different objects simultaneously, which lets
their eyes move independently from each other. This gives them a full
360-degree arc of vision around their body. When prey is located, both eyes can
be focused in the same direction, giving sharp stereoscopic vision and depth
perception. Chameleons have very good eyesight for reptiles, letting them see
small insects from a long (5–10 m) distance.
3. Ballistic tongues
that are 1.5-2 times the length of their body.
Chameleons
feed by ballistically projecting their long tongue from their mouth to capture
prey located some distance away. While the chameleon’s tongue is typically
thought to be 1.5 to 2 times the length of their body (their length excluding
the tail), it has been recently discovered that smaller chameleons have
proportionately larger tongue apparatuses than their larger counterparts.
Tongue projection occurs at extremely high performance, reaching the prey in as
little as 0.07 seconds, having been launched at accelerations exceeding 41 g.
The chameleon tongue’s tip is a bulbous ball of muscle, and as it hits its prey
it rapidly forms a small suction cup.
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