Nature

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Across
  1. 3. Plants unwelcome in the garden
  2. 5. Tree's woody stem
  3. 10. The group of stars forming a recognisable pattern
  4. 12. The number of spider's legs
  5. 13. Sound cows make
Down
  1. 1. Male duck
  2. 2. Marine plants that grow in the water
  3. 4. Planet with many rings
  4. 5. Fruit frequently mistaken for a vegetable
  5. 6. Large marsupial
  6. 7. Young baby bird
  7. 8. The perceptible natural movement of air
  8. 9. Small animal that has six legs and generally one or two pairs of wings
  9. 11. Flying mammal