Q 01/05

What signal tells red-eyed tree frog embryos a snake is at their clutch, so they hatch days early?

A) Chemical scents

B) Vibrations

C) Passing shadows

D) Body heat

Answer · why

B) Vibrations

Vibrations from the snake's jaws are the cue, and the embryos can tell them apart from the patter of a rainstorm. Hatchlings wriggle free and drop int...

Q 02/05

The Rainforest Alliance made the red-eyed tree frog its mascot because it is common in which country?

A) El Salvador

B) Guatemala

C) Costa Rica

D) Nicaragua

Answer · why

C) Costa Rica

Costa Rica is where the group first worked to protect forests in the late 1980s, and the frog was a familiar sight there. Its seal now appears on coff...

Q 03/05

What is the gold-veined nictitating membrane that covers a sleeping red-eyed tree frog's eye?

A) A third eyelid

B) A film of dried mucus

C) A fold of cheek skin

D) A second cornea

Answer · why

A) A third eyelid

A third eyelid, see-through and laced with gold, lets the frog rest while still noticing a predator's approach. Many birds, reptiles and sharks have o...

Q 04/05

What does a female red-eyed tree frog look for beneath a leaf before laying her eggs on it?

A) Soft moss

B) A stream

C) Leaf litter

D) A pond

Answer · why

D) A pond

A pond or large puddle sits below the chosen leaf, so the tadpoles simply slide off and splash down. Each clutch holds roughly 40 eggs.

Q 05/05

Red-eyed tree frog tadpoles graze on algae and plankton, but what else will they sometimes eat?

A) Small fish

B) Each other

C) Water snails

D) Dragonflies

Answer · why

B) Each other

Each other is on the menu, since the tadpoles turn cannibal as well as scavenging carrion. Dragonflies, meanwhile, are among the hunters that eat them...