| Answer | Crossword Clue |
|---|---|
| TRILLERS | Birds with vibrato calls |
| TRUMPETERSWANS | Birds with loud calls |
| EMUS | Birds with deep drumming calls |
| HOOTS | Night birds' calls |
| KILLDEERPHOEBE | Two birds named for their calls |
| CHICKADEECUCKOO | Two more birds named for their calls |
| CURLEWBOBWHITE | Two more birds named for their calls |
