--- title: Groups of animals and how to tell them apart — a lesson of Mova's school · trees and pragmatics description: «Groups of animals and how to tell them apart», a lesson of the world course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Scientists sort animals into groups by their bodies, not by where they live or how they move. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/) [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/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / Groups of animals and how to tell them… # Groups of animals and how to tell them apart Lesson 24 of the world course of Mova's primary school: 18 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/world/24-animal-groups/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/0/) — Scientists sort animals into groups by their bodies, not by where they live or how they move. - [1](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/1/) — Animals with a backbone are vertebrates: mammals have hair or fur and feed their babies milk; birds have feathers and lay hard-shelled eggs; fish live in water, breathe with gills and most have scales and fins. - [2](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/2/) — Reptiles have dry, scaly skin and most lay leathery eggs on land; amphibians have smooth, moist skin, lay soft eggs in water and usually start life in water before living on land. - [3](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/3/) — Animals without a backbone are invertebrates: insects have six legs and three body parts (head, thorax, abdomen), while spiders have eight legs and two body parts. - [4](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/4/) — A dolphin lives in the sea and has fins, but it breathes air and feeds its baby milk, so it is a mammal, not a fish. - [6](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/6/) — Mammals have hair or fur and feed their young with milk. - [7](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/7/) — Most mammals give birth to live young. - [8](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/8/) — Birds have feathers, a beak and lay eggs with hard shells. - [9](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/9/) — Fish breathe with gills and most have fins and scales. - [10](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/10/) — Reptiles have dry, scaly skin and most lay eggs with leathery shells. - [11](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/11/) — Amphibians have smooth, moist skin and usually lay their eggs in water. - [12](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/12/) — Young amphibians usually live in water and breathe with gills; adults usually breathe with lungs and through their skin. - [13](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/13/) — Insects have six legs and three body parts: head, thorax and abdomen. - [14](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/14/) — Spiders have eight legs and two body parts, and no antennae. - [15](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/15/) — Insects and spiders have no backbone; they have a hard outer skeleton. - [16](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/16/) — Mammals and birds keep their bodies warm from inside; fish, amphibians and reptiles take their warmth from their surroundings, so people often call them cold-blooded. - [17](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/17/) — Frogs, toads, newts and salamanders are amphibians; snakes, lizards, crocodiles and turtles are reptiles. - [18](https://md.mova.elamur.ai/free/en/corpora/school/world/24-animal-groups/18/) — Ants, bees, beetles and butterflies are insects; snails, worms, woodlice and scorpions have no backbone either but are not insects: a woodlouse has fourteen legs and a scorpion has eight. - ← previous: [Flowers, pollination and how seeds travel](https://md.mova.elamur.ai/free/en/corpora/school/world/23-flowers-and-seeds/) - next →: [Life cycles](https://md.mova.elamur.ai/free/en/corpora/school/world/25-life-cycles/) - ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/school/world/)