Nature puzzle

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Across
  1. 3. "to … or not to …"
  2. 4. friendly bird
  3. 7. bird reputed to collect shiny objects
  4. 8. flower, got up
  5. 11. rabidly (anagram)
  6. 12. evergreen tree commonly found in churchyards
  7. 13. found underneath the horse chestnut tree in autumn
Down
  1. 1. her cry (anagram)
  2. 2. goes by the name of Jenny
  3. 3. this one is not for use in a cricket match
  4. 5. would margarine do?
  5. 6. I wager (anagram)
  6. 9. first flower of spring
  7. 10. "from little acorns grow"
  8. 13. what lies beneath