§ Comparison

Arctic tern or Arctic fox.

Weight

0.086–0.127 kgen.wikipedia.org

1.4–9.4 kgen.wikipedia.org

Length

0.33–0.36 men.wikipedia.org

0.46–0.68 men.wikipedia.org

Lifespan

15–34 yearsnwf.org

11 yearsen.wikipedia.org

Young per litter

1–3en.wikipedia.org

3–25en.wikipedia.org

Population

3,000,000 individualsaudubon.org

400–600 individualsregionalpolarjournal.net

Habitat

Lives in the seaen.wikipedia.org

Lives on the grounden.wikipedia.org

Activity

Moves by dayen.wikipedia.org

Is active around the clocken.wikipedia.org

Diet

Eats fishpmc.ncbi.nlm.nih.gov

Eats a bit of everythingen.wikipedia.org

Social life

Lives in a colonyen.wikipedia.org

Lives in a family groupen.wikipedia.org

Mating

Forms a lasting pairen.wikipedia.org

Forms a lasting pairen.wikipedia.org

Shelter

Builds a nesten.wikipedia.org

Shelters in burrowslink.springer.com

Body temperature

Makes its own heatcoolantarctica.com

Makes its own heaten.wikipedia.org