It is time-consuming for a player to have to sneak up on certain critters and catch them for the conservatory in order to get crafting materials. We already get worker bees via the propagation hives and jar of bees (small and medium). Having Biome specific terrariums to breed certain critters would be tremendously beneficial especially for the ||Fae and Mountain|| Critters which are difficult to catch but have needed materials. In fact for balancing purposes, rarer critters (like the red frog in the lowlands) would take longer to proliferate in a terrarium so that players would not abuse them too much.
#Biome Specific Critter Terrariums
cedar nymph
inland pond
Specifically--take away having to hunt for bees. I haven't tried the jars of bees yet--but even that looks time consuming. It would be nice to just have beehives, you add bees, and they stay there always--and/or multiply.