§ Comparison

Arctic tern or Axolotl.

Weight

0.086–0.127 kgen.wikipedia.org

0.06–0.227 kgnationalgeographic.com

Length

0.33–0.36 men.wikipedia.org

0.15–0.45 men.wikipedia.org

Lifespan

15–34 yearsnwf.org

10–15 yearsen.wikipedia.org

Sexual maturity

3–4 yearsbinocularbase.com

1.5–2.25 yearsen.wikipedia.org

Young per litter

1–3en.wikipedia.org

100–500fr.wikipedia.org

Population

3,000,000 individualsaudubon.org

50–1,000 individualsworldwideen.wikipedia.org

Habitat

Lives in the seaen.wikipedia.org

Lives in fresh wateren.wikipedia.org

Activity

Moves by dayen.wikipedia.org

Comes out at nightnationalgeographic.com

Diet

Eats fishpmc.ncbi.nlm.nih.gov

Eats meaten.wikipedia.org

Social life

Lives in a colonyen.wikipedia.org

Goes it alonenationalgeographic.com

Mating

Forms a lasting pairen.wikipedia.org

No fixed pairsde.wikipedia.org

Body covering

Has feathersen.wikipedia.org

Has bare skinnationalgeographic.com

Pattern

Is a single colouren.wikipedia.org

Is speckleden.wikipedia.org

Body temperature

Makes its own heatcoolantarctica.com

Depends on outside warmthen.wikipedia.org