Marsh owl vs Stygian owl
The stygian owl is heavier: 565 g against 334 g for the marsh owl, about 69% more.

Photo: Josefito123 · CC BY-SA 4.0 · Wikimedia Commons

Photo: Herbert G. Fischer · CC BY-SA 3.0 · Wikimedia Commons
What is the difference between a marsh owl and a stygian owl?
Each point below is worked out from a pair of recorded values.
- The stygian owl is heavier: 565 g against 334 g for the marsh owl, about 69% more.
- Both belong to the genus Asio, so they are close relatives.
- Both are listed as Least Concern on the IUCN Red List.
Side by side
| Marsh owl | Stygian owl | |
|---|---|---|
| Scientific name | Asio capensis | Asio stygius |
| Family | Strigidae | Strigidae |
| Order | Strigiformes | Strigiformes |
| Weight | 328.3 g – 340 g | 553.2 g – 565 g |
| Length | Not recorded | Not recorded |
| Lifespan | Not recorded | Not recorded |
| Main food | Not recorded | Not recorded |
| Habitat | grassland | forest |
| Conservation status | Least Concern | Least Concern |
| Countries recorded | Not recorded | Not recorded |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Marsh owlFull record: Stygian owlCompare other animals