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BW, Great job!
1) Name the only species of North American rattlesnake where the males bite each other during male combat.
Answer: Sidewinder (Crotalus cerastes)
2) How many lungs do snakes have:
a) 1
b) 2
c) 3
d) none of the above
e) all of the above
Answer: e) All snakes have a large right lung, many species have a small left one. In many species a new lunglike structure has evolved from the wall of the trachea anterior to the heart. This new lunglike structure has simple vascularized sacs with some alveoli just like the "normal" lung(s).
3) Name the two non-native species of snake that have been introduced to the U.S. and now have established populations.
Answers: Boa Constrictor (Boa constrictor)
Brahminy Blindsnake (Ramphotyphlops braminus)
*Note: Could not find documentation supporting established populations of Burms or Indian Cobras in the U.S.
4) Name the only marine species native to the U.S
Answer: Yellow-bellied Sea Snake (Pelamis platurus)
5) Most U.S. species are considered terrestrial, name the seven genera that contain semi-aquatic species.
Answers: Agkistrodon
Clonophis
Farancia
Nerodia
Regina
Seminatrix
Thamnophis
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