They are predators of small crickets, mealworms, cockroaches, Spiders, and other small bugs.
Crocodile geckos predators are snakes and owls
camouflage
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Gecko's can loose there tails more easily. This is used as a form of escape from predators. Geckos have the ability to vocalize. they do this for breeding purposes or when showing aggression.
no geckos do not die when there tail falls of it is a defense strategy to defend against predators. Most species will grow a new one back.
Most geckos are insectivores with some as the exception being omnivorous and enjoying pollen, saps, and fruit. These animals are predators and will seek out live insects as prey items. Slower, sturdy geckos are typically ambush predators while most species with setea on their feet are generally very quick and have no problem chasing down a roach/beetle/worm etc..
Some lizards (Geckos definitely) have the ability to "drop" their tails if they are threatened or attacked.
Geckos have the ability to vocalize, to sound alarms when threatened, for breeding purposes etc.. They can also detach their tails to escape predators.
Geckos are prey to a variety of animals. Large birds of prey are able to sneak up on geckos from above. Medium - large sized mammals are able to make a quick meal of a gecko. Other gecko species have been known to eat smaller geckos. Geckos have a very soft exterior without any outer protection and can make a easy meal for almost anything bigger than itself.
Lizards aren't geckos, but geckos are lizards
A tokay geckos natural instinct is to defend one's self. A tokay will bark to ward off predators, call a mate, stress, or simple exhaustion.
Geckos are different than any other reptile species because they are able to vocalize. They are able to do this for many different purposes from attracting a mate - warding of predators.