What happens when tadpoles hatch?

They drop into the stream below

Glass Frog Quiz: See-Through Skin and Hidden Hearts

This glass frog quiz peers through the clear skin of the rainforest's most see-through amphibians. Play an interactive set of 10 questions on where they live, why their bellies are clear, seeing the heart, hiding red blood cells in the liver, night activity, eggs on leaves over streams, fathers guarding eggs, tadpoles dropping into water and a Kermit lookalike.

Start Glass Frog Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Region
Where do glass frogs live?
Skin
What is special about their belly skin?
Heart
Which organ can you sometimes see beating?
Blood
Where do they hide red blood cells while sleeping?
Time
When are glass frogs most active?
Eggs
Where do many glass frogs lay eggs?
Dad
Which parent often guards the eggs?
Tadpoles
What happens when tadpoles hatch?
Color
What color are most glass frogs from above?
Kermit
Which glass frog went viral for looking like Kermit?

Explanations: answer key for all 10 questions

Q1: Where do glass frogs live?
Answer: Central and South America
They live in rainforests.
Q2: What is special about their belly skin?
Answer: It is see-through
You can see organs inside.
Q3: Which organ can you sometimes see beating?
Answer: The heart
Its skin is like a window.
Q4: Where do they hide red blood cells while sleeping?
Answer: In the liver
This makes them more transparent.
Q5: When are glass frogs most active?
Answer: At night
They are nocturnal.
Q6: Where do many glass frogs lay eggs?
Answer: On leaves over streams
The leaves hang above water.
Q7: Which parent often guards the eggs?
Answer: The father
Males stay close by.
Q8: What happens when tadpoles hatch?
Answer: They drop into the stream below
Gravity helps them.
Q9: What color are most glass frogs from above?
Answer: Green
It hides them on leaves.
Q10: Which glass frog went viral for looking like Kermit?
Answer: Diane's bare-hearted glass frog
It was described in Costa Rica in 2015.

Glass Frog Quiz – See-Through Skin and Hidden Hearts

Glass frogs live in the rainforests of Central and South America. From above they are green, but their belly skin is see-through, so you can often see the heart beating and other organs inside.

A 2022 study found that sleeping glass frogs move most of their red blood cells into the liver, making their bodies far more transparent. This helps them stay hidden from predators while they rest on leaves during the day. They become active at night.

Many glass frogs lay eggs on leaves hanging over streams, and fathers often guard them. When the tadpoles hatch, they drop into the water below to grow. A species described in Costa Rica in 2015, Diane's bare-hearted glass frog, went viral for looking like Kermit the Frog.

What This Quiz Teaches

Nature fans will enjoy these questions.

Where they live
Why they look clear
How they hide
How they raise young
Which species went viral

Did You Know?

Most glass frogs are only a few centimeters long.
Their clear skin may blur their outline on leaves.
Many species are threatened by forest loss.
Males call from leaves to attract mates.
Scientists study their blood trick to learn about clotting.