Assertion: echidna's gland | /r/HasProperty | mammary
Facets:
Source sentences:
text: Echidnas have mammary glands, and their young are nourished by their own milk, hence, mammal.
text: Echidnas do not have a permanent pouch like a kangaroo, but instead, as their mammary glands swell during her 22 day pregnancy, the extra tissue creates a rearward facing "pouch" of skin on her belly that she will lay her single egg directly into.
text: The echidna does not have teats, but rather excretes milk from its mammary glands, that the newborn will simply lick off the mother’s belly.