1. Woodcock’s nasal peent.
  2. Spring smell.
  3. Peepers’ chorus.
  4. Juncos leaving.
  5. Woodpeckers drumming.
  6. Duck flights.
  7. Tree and flower buds.
  8. Owls hooting.
  9. Clumps of raptors/pairs of raptors.
  10. Songbird songs.
Photo: flskibum85
Source: Bird Watchers