Table 2. Average δ13C and δ15N values of potential prey available in coastal and inland habitats in Iceland.
| Prey | Habitat | δ13C | δ15N |
| Black Guillemot (Cepphus grille) | Coastal | −17.41 | 14.28 |
| Marine fish (Myxocephalus scorpius) | Coastal | −15.75 | 15.91 |
| Starfish (Echinoderma) | Coastal | −14.47 | 11.42 |
| Eider (Somateria mollissima) | Coastal | −19.99 | 8.99 |
| Ptarmigan (Lagopus sp.)1 | Coastal and Inland | −23.72 | 2.81 |
| Snipe (Gallinago gallinago) | Coastal and Inland | −25.11 | 7.04 |
| Redshank (Tringa totanus) | Coastal and Inland | −24.52 | 7.12 |
| Wood mouse (Apodemus sylvaticus) | Coastal and Inland | −24.84 | 10.28 |
1
) Data from interior Alaska [56].
The prey table is not comprehensive and data are not intended for quantitative analyses, but rather to exemplify the wider isotope niche width that is available in coastal habitats.