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      Comparing the life cycles of mammals and birds

      Lesson details

      Learning outcome

      I can describe the differences in the life cycles of mammals and birds.

      Key learning points

      1. Different life cycles can be compared to find similarities and differences
      2. Mammals and birds have some similarities and some differences in their life cycles
      3. Differences in life cycles can be communicated using scientific diagrams and tables

      Keywords

      • Life cycle - A life cycle is the way in which a living thing changes as it ages.

      • Mammal - A mammal is a warm-blooded animal that gives birth to live young and has hair or fur.

      • Bird - A bird is a warm-blooded animal that lays eggs and has feathers, wings and a beak.

      • Similarity - A similarity is something that two objects have in common.

      • Difference - A difference between two objects or things is something that is not similar or the same about them.

      Common misconception

      All animal life cycles have the same stages; anything different to mammals is not an 'animal'.

      Use the examples in the slide deck to make it clear that different types of animals have different life cycles.

      Teacher tip

      If you have access to tablets or computers for research, children can research their favourite animals and compare findings with their peers to improve engagement.

      Equipment

      Access to the internet for research (optional).

      Content guidance

      Risk assessment required - equipment

      Supervision

      Adult supervision required

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Match the word to the correct definition.

      Correct Answer:similarity,Something that things have in common.
      Correct Answer:difference,Something that is not the same when comparing things.

      Q2.
      What is the scientific name for a fully grown mammal?

      Correct Answer: adult

      Q3.
      Match the mammal life cycle stage to the correct description.

      Correct Answer:baby,The mammal has just been born and needs lots of help.
      Correct Answer:young,The mammal is still growing and becoming more independent.
      Correct Answer:adult,The mammal is fully grown and is able to reproduce.

      Q4.
      Egg, , fledgling, adult. Which stage is missing from the bird life cycle?

      Correct Answer: hatchling

      Q5.
      Birds lay eggs. Which life process is laying eggs part of?

      growth
      Correct answer: reproduction
      nutrition
      movement

      Q6.
      Which one of these can an adult bird do, but a fledgling bird cannot?

      Correct answer: reproduce
      eat
      sense the world around them
      move

      6 Questions

      Q1.
      Match the animal to its life cycle.

      Correct Answer:Mammal,baby, young, adult
      Correct Answer:Bird,egg, hatchling, fledgling, adult

      Q2.
      We can use scientific diagrams and tables to compare similarities and between animal life cycles.

      An image in a quiz
      Correct Answer: differences, different

      Q3.
      Which life cycle stage do mammals and birds share?

      egg
      hatchling
      fledgling
      Correct answer: adult

      Q4.
      What is the name for the life cycle stage at which both birds and mammals can reproduce?

      Correct Answer: adult, adults

      Q5.
      What is the name for this type of diagram that can be used to compare and contrast things?

      An image in a quiz
      Carroll diagram
      Correct answer: Venn diagram
      Life cycle diagram
      Circle diagram

      Q6.
      Which of these is a reason for scientists to use a table or diagram?

      To make information look nicer.
      To translate information into another language.
      Correct answer: To organise information clearly.
      To make information more complex.

      To help you plan your 5 science lesson on: Comparing the life cycles of mammals and birds, download all teaching resources for free and adapt to suit your pupils' needs...