Across
- 3. not normal for the animal
- 4. how often it happens
- 6. a lion in a herd of zebras
- 8. a bird chirping
- 9. between individuals of a single species.
- 10. watching something for a long time
Down
- 1. giving birth
- 2. birds flying to different lands during the year
- 5. occurring between different species.
- 7. how long