Red knot vs Surfbird
The surfbird is heavier: 201 g against 141.9 g for the red knot, about 42% more.
Photo: Arnstein Rønning · CC BY-SA 3.0 · Wikimedia Commons
Photo: marlin harms · CC BY 2.0 · Wikimedia Commons
What is the difference between a red knot and a surfbird?
Each point below is worked out from a pair of recorded values.
- The surfbird is heavier: 201 g against 141.9 g for the red knot, about 42% more.
- Both belong to the genus Calidris, so they are close relatives.
- The red knot is listed as Near Threatened on the IUCN Red List; the surfbird is Least Concern.
Side by side
| Red knot | Surfbird | |
|---|---|---|
| Scientific name | Calidris canutus | Calidris virgata |
| Family | Scolopacidae | Scolopacidae |
| Order | Charadriiformes | Charadriiformes |
| Weight | 125.8 g – 148 g | 186.9 g – 216.2 g |
| Length | Not recorded | Not recorded |
| Lifespan | 16.1 years | Not recorded |
| Main food | Not recorded | Not recorded |
| Habitat | coastal | coastal |
| Conservation status | Near Threatened | Least Concern |
| Countries recorded | 1 | Not recorded |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Red knotFull record: SurfbirdCompare other animals