--- title: Frogs of the world: tree frogs, glass frogs, flying frogs and the goliath frog — a lesson of Mova's school · trees and pragmatics description: «Frogs of the world: tree frogs, glass frogs, flying frogs and the goliath frog», a lesson of the biology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Frogs live on every continent except Antarctica, and they come in amazing shapes: frogs tha --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / Frogs of the world: tree frogs, glass… # Frogs of the world: tree frogs, glass frogs, flying frogs and the goliath frog Lesson 308 of the biology course of Mova's primary school: 15 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/0/) — Frogs live on every continent except Antarctica, and they come in amazing shapes: frogs that stick to glass, frogs you can see through, frogs that glide between trees, a frog as big as a house cat and frogs small enough to sit on your fingernail. - [1](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/1/) — Think of a tree frog stuck to a window at night. - [2](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/2/) — Its round toe pads are covered in tiny six-sided cells with slime between them, gripping like a wet tyre on a road. - [3](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/3/) — Frogs are odd in everyday ways too. - [4](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/4/) — Most do not drink with their mouths but soak water in through their skin, and when a frog swallows it blinks, pulling its eyes down into its head to help push the food down. - [5](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/5/) — Many frog fathers are surprisingly good parents: glass frog fathers guard eggs on leaves, and the Darwin's frog father keeps his tadpoles in his throat until they hop out as tiny froglets. - [6](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/6/) — Tree frogs have round sticky toe pads covered in tiny six-sided cells with slime between them, gripping like a wet tyre; scientists study them to make better tyres and tape. - [9](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/9/) — In many glass frogs the father guards the eggs on a leaf, keeping them wet and safe from wasps. - [10](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/10/) — Wallace's flying frog of Borneo and Malaysia spreads its huge webbed feet and skin flaps like parachutes to glide down between trees, about 15 metres reported; Alfred Russel Wallace described it in the 1850s. - [11](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/11/) — The goliath frog of Cameroon and Equatorial Guinea is the biggest frog in the world, about 32 centimetres long and over 3 kilograms; a 2019 study reported it moves heavy stones to build little pools for its eggs. - [12](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/12/) — Some of the smallest frogs, from Papua New Guinea and Brazil, are less than 8 millimetres long; they live in damp leaf litter eating tiny mites and are among the smallest animals with a backbone. - [13](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/13/) — Frogs usually have four toes on each front foot and five on each back foot, 18 toes in all; the long back feet are often webbed for jumping and swimming. - [14](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/14/) — Most frogs do not drink with their mouths; they soak water in through their skin, especially a thin patch on the belly, which is why dirty water hurts them so quickly. - [15](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/15/) — Frogs pull their eyes down into the head when they swallow, so the eyeballs press on the roof of the mouth and help push food down the throat. - [16](https://md.mova.elamur.ai/free/en/corpora/school/biology/308-frogs-of-the-world-tree-frogs-glass-frogs-flying-frogs-and-the-goliath-frog/16/) — The male Darwin's frog of Chile and Argentina keeps tadpoles in his vocal sac until they hop out as froglets; the gastric-brooding frog of Australia raised its babies in its stomach, but it is now extinct. - ← previous: [Beetles of every kind: stag beetles, dung beetles, fireflies, bombardiers and weevils](https://md.mova.elamur.ai/free/en/corpora/school/biology/307-beetles-of-every-kind-stag-beetles-dung-beetles-fireflies-bombardiers-and-weevils/) - next →: [Frogs and toads near home: spawn, croaking choruses, toad crossings and the fire-bellied toad](https://md.mova.elamur.ai/free/en/corpora/school/biology/309-frogs-and-toads-near-home-spawn-croaking-choruses-toad-crossings-and-the-fire-bellied-toad/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/)