Would you ever help your rival? For chipping sparrows, the answer is in the trill. We interviewed Dr. Sarah Goodwin to see what it would take for sparrows to join forces.
FURTHER READINGS
- Team of rivals: alliance formation in territorial songbirds is predicted by vocal signal structure (Royal Society)
- ‘Team of rivals’ approach works for sparrows defending territories (Science Daily)
- Chipping sparrow trills (Audubon)