Nature

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Across
  1. 2. These insects communicate with one another by dancing.
  2. 4. A sea animal with three hearts.
  3. 7. Surprising but this river is considered the world's longest one.
Down
  1. 1. The biggest animal that roamed the earth.
  2. 2. This is the world's fastest growing plant.
  3. 3. These creatures have names for each other.
  4. 5. These dangerous creatures have been on our planet for over 400 million years (they are older than dinosaurs).
  5. 6. This animal has a better memory than most creatures.