Yeah. That just doesn't seem to make sense.

I can understand creatures that have established in-game relationships (e.g. Imps & Wolves), or have some biological kinship (e.g. Chigoes & Swarms, Funguars & Roselings). But natural enemies shouldn't be calling each other for help. Plants shouldn't be calling animals for help, animals shouldn't call plants for help ... and prey shouldn't be teaming up with predators.
Well, predators appear whenever they hear some prey in peril, that's just natural. But the other way round... well, it is a game, and they need to make the battle system more interesting. So whatever ^.^