| Book name (en) | The Birds of Australia |
| Book volume | Vol.1 |
| Identifier | 1-26 |
| Gould Scientific name | Circus assimilis |
| Scientific name | Circus approximans |
| Gould name (en) | Allied Harrier |
| Name (en) | Swamp Harrier |
| Order | ACCIPITRIFORMES |
| Family | Accipitridae |
| Book name (en) | The Birds of Australia |
| Book volume | Vol.1 |
| Identifier | 1-26 |
| Gould Scientific name | Circus assimilis |
| Scientific name | Circus approximans |
| Gould name (en) | Allied Harrier |
| Name (en) | Swamp Harrier |
| Order | ACCIPITRIFORMES |
| Family | Accipitridae |