Birds & Mammals
Science: Year 5 & 6 National Curriculum, topic 6.1.5
Birds & Mammals
Birds and mammals are groups of vertebrates.

Birds
- Birds have lungs.
- Birds have internal fertilisation.
- Birds are oviparous. This means they lay eggs.
- Birds are homeotherms. This means they maintain their body temperature.

Mammals
- Mammals are viviparous. This means they give birth to live young.
- Mammals are homeotherms. This means they maintain their body temperature.
- Mammals have lungs.
- Mammals have internal fertilisation.
Test yourself on Birds & Mammals
What is correct about birds?
What is correct about mammals?