Linked from

The 6 pages that link to Echidna, each with the reason it gives.

• MammalBroader topic: Echidnas provide another living example of monotreme reproduction.

• TorporBroader topic: Echidnas show that torpor occurs in monotremes as well as placental mammals.

• MonotremeBroader topic: Echidnas show how monotremes adapted egg-laying mammalian biology to life on land.

• AnteaterCompared with: Its monotreme ancestry and spiny body distinguish it from anteaters.

• PorcupineCompared with: Echidnas have spines, but they are monotremes rather than rodents.

• ErinaceidaeCompared with: Echidnas look superficially hedgehog-like but belong to a distant mammalian lineage.