Moths on Birch Bark

In the picture

1. 1Badge 1 sits on the pale speckled moth on the left light bark.
2. 2Badge 2 sits on the dark brown moth on the left light bark.
3. 3Badge 3 sits on the dark brown moth on the right soot-blackened bark.
4. 4Badge 4 sits on the pale speckled moth on the right soot-blackened bark.

Examples

• Peppered moths in old English forests.
• Lizards that match the colour of the rocks where they rest.

Quiz: Moths on Birch Bark (Age 10)

1. 1

   Why does a pale moth survive better on light birch bark?

   • Its colour blends in with the bark.
   • It can fly faster than birds.
   • It tastes bad to birds.
2. 2

   What happens to pale moths when soot makes the bark dark?

   • They are easier for birds to see.
   • They become dark brown to match the bark.
   • They stop laying eggs until the bark is light again.
3. 3

   When the bark stays dark for many years, which moths become more common?

   • Dark brown moths.
   • Pale speckled moths.
   • Moths of both colours equally.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.