they have neurotoxic poison all over their skin
It depends on the type of tree frog, but non poisonous frogs generally use camouflage for defense.
hawks, snakes, and natural causes
He poisons predators.
Predators, Winter, not enough food, pollution, habitat destruction, etc.
The Red Eyed Tree Frog has enemies. Some of the enemies are birds, owls, large snakes, and bats. The Red Eyed Tree Frog has ways to protect itself. This frog has camouflage. This makes it so this frog is not endangered.
With the nictitating membrane, which keeps it moist
Many frogs are poisonous, and/or taste bad. They advertise this fact to their predators through the use of colors on their skin. Some frogs camoflauge themselves by having skin colour similar to their surroundings. eg Green tree frog has the colour of a leaf. Some frogs mimic the colours of a poisonous frog, to trick their predators into thinking they are poisonous. Finally, frogs may jump or swim away when they think a predator is after them.
snakes, and other birds
For example, if a frog is brown, then it can camouflage or hide in the mud. If it is green, it can hide on leaves. Like the tree frog. Kind of like being invisible. Animals are usually the colur of their surroundings to survive better in the wild. Camouflaging is VERY important when it comes to predators and prey.
The red eyed tree frog isn't poisonous, it has its bright colors to scare off predators. So if you interact with one nothing bad would happen.
whites tree frogs/dumpy tree frog/ smiling tree frog
Leaves of the canopy can help keep it hidden. Depending on the species, a lemur sometimes sleeps in tree holes to protect themselves from predators. Tree limbs also provide escape routes from some predators.