KnowraEchidnaLinked fromLinked fromThe 6 pages that link to Echidna, each with the reason it gives.All 6Broader topic 3Compared with 3MammalBroader 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.