Alphabeaver

Instead of silently spawning as other animals do, Alphabeavers appear in a group only when the Alphabeavers event triggers. They have a muffalo's tolerance to cold and an iguana's tolerance to heat, so they will likely survive in whatever biome they spawn in. Their hunger bar depletes so rapidly that they must eat at a near constant rate - and they eat nothing but trees. If your colony has no need for wood, then alphabeavers pose no threat and can be ignored. A player with a need for lumber will usually choose to eliminate the threat by hunting them.

Alphabeavers will not attack your structures (although it may be possible if driven mad by a psychic drone), so you may construct walls to resolve the issue. If the alphabeavers are located behind a chokepoint you may choose to wall it off to confine them. This confinement denies them access to most trees on the map and they will soon leave the map or die of starvation. If you have an enclosed base with a sufficient supply of trees within the confines you can ignore the alphabeavers, unless they exploit an open door and slip inside. If slain, they can be butchered for 72 alphabeaver meat and 16 beaverskin.^[1]