Ten Things That May Amaze You About Frogs & Toads

So in preparation for an amphibian program I had recently I did a lot of reading, much of which was fascinating but didn’t actually apply to my program because it was about amphibians in other parts of the world instead of here in western North Carolina.

Spring peeper

Spring peeper

Some of this stuff is right out of a science fiction movie so I decided to write a post about it. I suspect you will be as blown away as I was! We live in an amazing world and there are so many wickedly-awesome adaptations that animals have!

So here then, are 10 Things You May Not Know about frogs and Toads:

Frogs are slimy and hard to hold!

Frogs are slimy and hard to hold!

1. Have you ever touched a frog and noticed how slimy it was? That’s because they have mucus glands that secrete slime to keep them moist since they can obtain oxygen through their skin. They also breathe through their nostrils and lungs but about 50% of their oxygen is through their skin and when they are underwater, all of the oxygen exchange takes place through their skin.

2.Did you know frogs and toads shed their skin? Some do this daily, some weekly or less frequently. I have never seen this but have read that it’s like the frog suddenly has the hiccups and starts moving strangely, then peels off its outer skin, like removing a sweater. Then, guess what? It eats it! Yum.

3.Some frogs and toads, like our Cope’s gray tree frog, can change their color. Light, moisture, temperature and even mood can affect this!

Gray tree frogs can change colors!

Gray tree frogs can change colors!

4.The largest frog on Earth lives in West Africa and gets to be a foot long. It is aptly named the Goliath Frog. As for the smallest frog, it is a tie between the Gold Frog in Brazil and the Eleutherodactylus iberia (Yikes, I’m not going to try to pronounce that! Too bad they don’t have a common name yet for this frog!) that was discovered in 1996 in Cuba. Both are only about 9.8mm long! And we thought our spring peeper was tiny! (Our spring peeper is 1 inch long!)peep-5854

5. Many frogs and toads make noises to attract mates. They do their by inflating their vocal sac or sacs. (Some frogs have one but others have two, one on either side of their mouth) When they do this, it looks like they are chewing gum and blowing a giant bubble. Sometimes the noise of a lot of frogs doing this at once is DEAFENING! The songs can sometimes be heard a mile away! Ever wondered why they don’t go deaf with all of this noise? It’s because their ears or tympanums are connected to their lungs which also vibrate when they call. This pressure keeps frogs from hurting their own ears as they call. peep-

6.Have you heard of a pipi pipi toad? My gosh, this toad is incredible! The male actually embeds the female’s eggs onto her back, and then the skin grows over them so the developing eggs are INSIDE of her back! Then, incredibly, fully formed froglets hatch out several months later! Check out this video:

7. Maybe you’ve heard of Darwin’s Frog? This is a frog that looks like an overweight leaf and lives in the Amazon. The male actually swallows the tadpoles and then allows them to grow up INSIDE his vocal sac. Wait’ll you see what happens when they become fully formed frogs!

8. Wood frogs are a frog that we have here in the US, especially on the east coast, but even up as far north as the Arctic Circle. Amazingly, this frog can freeze solid–with more than 60% of its body frozen–and then just wake up and thaw out in the spring. As the first ice begins to form on their body, it sets off an alarm reaction which then triggers the production of glucose in their body. This acts like anti-freeze and protects the INSIDES of their cells from freezing. In less than 15 hours their heart stops beating, they don’t breath, no blood circulates. They look DEAD. But as long as the temperature doesn’t go below -8 degrees, they will wake up in the spring and head off to continue their lives!

Wood frogs freeze!

Wood frogs freeze!

9. Did you know frogs have teeth? They don’t look much like ours, but they do have teeth on their upper jaw. They use them to hold prey in place before swallowing it whole.

10. Frogs’ tongues are not connected in the back of their mouths like humans, but rather in the front so they can “throw it out of their mouths” and use its stickiness to catch prey. Here’s a video of this:

I hope you are as amazed by frogs as I am! It was hard to narrow it down to only 10.

If you want to read more, here are a few other links

10 things you may not know about wood frogs

Here are some recordings of the songs of an American Toad, Spring Peeper,and Pickerel Frog.

What cool facts do you know about frogs and toads that I have not included? As always, I would love to hear from you!

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