* Bilbies are relatively uncommon: While they are a fascinating and unique animal, they are unfortunately facing endangerment, which means they aren't as commonly encountered or discussed as other animals.
* Lack of traditional usage: Unlike animals like birds, sheep, or wolves, where collective nouns have developed through long-standing human interaction and cultural significance, bilbies haven't had the same level of exposure in human culture.
However, if you'd like to invent a collective noun for bilbies, here are a few ideas based on their characteristics:
* A mob of bilbies: This plays on the word "mob" suggesting a group of animals moving together in a slightly chaotic manner, reflecting their hopping movement.
* A burrow of bilbies: This highlights their burrowing behavior and communal nesting habits.
* A warren of bilbies: This uses the existing collective noun for rabbits, reflecting their similar lifestyle.
* A flutter of bilbies: This is a bit playful, referencing their delicate ears and hopping movement.
Ultimately, the choice of a collective noun is yours!