From the Depths
Husks are pretty much Borg. They don’t eat, they don’t sleep, and they seemed to be linked directly to the creature. They will violently attack humans and animals alike.
Whatever link they do have with the hive mind, however, is easily blocked by radio signals. When blocked the husks become confused and basically immobile. Large radio towers have been built at most of the strongholds (thus keeping all husks about 10 miles away from each one) but attempts to build towers away from strongholds have all failed.
Their primary function seems to be building massive structures that are believed to be used for communication. Many have hypothesized that these structures will be used to give the location of Earth to other life forms in the universe (though there doesn’t appear to be a reason why).
It’s best to avoid them if at all possible, though recently there has been a movement to destroy the massive constructs they’ve been building over the years. The Resistance is especially active in this, fearing that anything they will be used for will be bad.