| 21. | During the summer months, the island becomes a breeding site for terns and tree snakes, geckos and skinks.
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| 22. | The introduction of the brown tree snake into Guam has resulted in extinction of twelve native bird species in total.
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| 23. | Natural predators include green tree snake and the copperhead snake, are also believed to be predators of the frog.
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| 24. | It makes loud noises, eats native bugs, and is a potential food source for the brown tree snake.
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| 25. | Blunthead tree snakes on the other hand, have vertical slits for pupils which allow for the snake to look down.
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| 26. | Generally, however, tree snakes in the wild will make a quick escape when they realize someone is watching them.
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| 27. | Overall, the vertebrate fauna and native flora of Guam have suffered tremendously because of the introduction of the brown tree snake.
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| 28. | Blunthead tree snakes are distributed in Mexico, most of Central America, and parts of South America south to northernmost Argentina.
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| 29. | Before leaping, Tree Snakes hang the uncoiled forepart of their body off the branch in a " like a J ".
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| 30. | Brown tree snakes are constrictors with evil-looking vertical pupils, rear fangs and mildly venomous saliva and a disproportionately large head.
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