1. There are almost five thousand known species of the frogs. Toads are included. Biologists don't really treat them differently. They all belong to the same group of animals.
2. Frogs don't drink! They absorb all needed moisture through the skin.
3. Several species of frogs have so translucent skin you can see their internal organs. They are called glass frogs.
4. Paedophryne amauensis is a frog species which grow only up to 0.8 cm what makes it the worlds smallest known vertebrate.
5. The hairy frog Trichobatrachus robustus is sometimes also called the horror frog. It owes its name to hairy (1) body and ability to break its own bones and stick them out of the skin to shock the enemy. It's able to retract the bones later and completely heal the wounds.
6. Only 5 cm long golden poison dart frog (Phyllobates terribilis) possess enough poison to kill up to 20 adult men.
7. Waxy monkey tree frog (Phyllomedusa sauvagii) produces a mix of alkaloids with narcotic power forty times stronger than morphine. Native Indians in Peru used this skin excretion called Sapo or Kambo before hunting or going on the warpath because it is an extremely powerful painkiller. It also suppresses hunger, thirst, and tiredness, intensifies sensitivity of senses, increasing physical strength at the same time. Medicine is still trying to find a way to safely introduce it in pharmacy, but owners of racehorses already abuse it.
8. Frogs, especially their legs, are popular in several world cuisines. The raising demand put frogs on the lists of endangered species in many countries, many are already extinct, due intensive hunting the natural balance and agriculture in many parts of the world were ruined, but frog farming introduced new problems - escaped animals became invasive species in new environments.
9. Most frogs are able to jump about twenty lengths of their bodies (for a human that would be more than thirty meters!) and some of the frogs living in the trees are also successful gliders being able to glide up to fifteen meters from the starting point.
10. Suriname toad (Pipa pipa) has a unique way of reproduction. A female lays eggs in batches of three to ten. These eggs are caught in the holes on their backs where tadpoles hatch and grow up to the fully developed toad stage.
11. There are also species of frogs which carry the fertilized eggs in their stomachs until tadpoles hatch and are then carried up to another two months - to jump out of the adult's mouth as fully developed frogs.
12. Each frog species has its own specific sound. Some are croaking, others barking, chirping, clucking, whistling, ...
13. Common coqui frog (Eleutherodactylus coqui) is the loudest known frog. With a call reaching one hundred decibels it equals the sound of the power lawn mower. Coqui frog is one of the symbols of Puerto Rico.
14. Frogs are extremely elastic and squishy animals capable to urinate out (!) a radio transmitter of a quarter of their lengths stabbed in their backs in a matter of a few days. It looks the evolution forced them to learn how to get rid of any foreign object out of the organism in order to survive.
15. Many frogs have extremely powerful tongues, being able to build the forces up to two times bigger than their own weight. Imagine being able to catch and pull a 150 kg pig with the sheer power of your tongue!
16. Holy Cross frog (Notaden bennettii) from Australia deserts produces the strongest non-toxic glue in the world. They spend nine months of the year underground. When it rains they come to the surface and numerous insects try to bite them. Instead of that, they are trapped on the skin which is shed later to provide a tasty and nutritious meal to the frogs.
17. Torrent frogs (Odorrana tormota) are able to communicate with each other on a chosen frequency (including ultrasound) being able to hear whatever they want no matter how much noise is in their surrounding. They also use the sound for locating possible mating opportunities.
18. Australian green tree frogs (Litoria caerulea) are able to live in deserts where there is no rain for months. They are hiding in hollow trees during the days, leaving them in the colder nights when they collect condensed water from air which is drunk through their skin.
19. Frogs are the only vertebrates immune to mosquito bites thanks to special repellents produced on their skin. Unfortunately, these repellents are too stinky to use among humans but there is still hope to find a way in the foreseeing future.
20. Every year when a frog goes into a hibernation a new layer of calcium sheath is formed around the bones. You can count these to find frogs age just like you can count the tree rings to find the age of a tree.
21. Frogs in captivity can live up to 20 years.
22. Frogs regularly shed their skin. Most of them do that once per week and some even every single day! After that, they usually eat it.
23. Frogs swallow with a power of their eye muscles. When they catch a pray in their mouths, they retract eyes and push the food in their stomachs!
24. The eyes of the frogs have usually excellent night vision. They are able to see in all ways at the same time - front, back, and both sides.
25. There is a frog in Indonesia (Barbourula kalimantanensis) which breaths through its skin only. It has no lungs!
26. While most frogs just lay their eggs and leave them, some are actually very devoted parents. The male of strawberry dart frog species guards the eggs and regularly waters them to keep the amount of moisture in safety measures.
27. The biggest frog in the world is Goliath frog. It lives in West Africa and weights up to three kg.
28. The world smelliest frog species lives is Venezuelan skunk frog (Aromabates nocturnus) and produces the same compound as skunks.
29. Frogs are around at least for two hundred million years. They lived before dinosaurs, they survived them but are today, thanks to the human race, more endangered as ever before.
30. The wood frog living in the Arctic Circle uses glucose in its blood as an antifreeze to survive even up to two-thirds of its body is frozen.
31. While most of the frogs live in fresh water some species adapted to live in areas with salty waters as well.
32. Their amazing transformations, adaptability, and fertility earned frogs many places in stories, myths, fables and fairy tales all over the world. The most known of all is probably The Frog King by Brothers Grimm.
33. Thanks to the close connection of frogs with water, life, and fertility they are widely considered as a sign of good luck and a popular motif on talismans.
34. A dream about the frog should always be explained in the context of the dream and the dreamer, but in most cases predicts important changes. Dreaming about a frog when you are in a serious relationship often means disappointment, cheating or similar unpleasant event in your love. The bigger the frog, bigger the problem or obstacle to solve or overcome. But if a frog is in the grass, it can mean you are about to meet somebody new and this person will soon become very important in your life. If you are dreaming about catching the frog, this may be a sign of illness, but if you are eating the frog, something good, probably in the field of finance, awaits for you in the near future.