From publisher blurb:
Creepy Crawly Critters
SWARMS is a beautiful bestiary for the Pathfinder Second Edition featuring 80 spectacular swarms of killer creatures perfect for your campaign! Within these pages, you'll find clouds and carpets of spiders and centipedes, wasps and snakes, including common vermin and monstrous variants like the vampire bat swarm and horribulous rat swarm. This creature collection also features tons of all-new swarms from the elemental gravelbugs and living wildfire to the sinister dead ink swarm, unquiet ash, and nettler demons; weirdness like the swarm of wonder, fairy rings, hexagnomes, neutron starlings, and whispering heralds; and whimsical challenges like animated silverware, finger-crushing lobsters, hungry penguins, and the floofy kitten swarm! These monsters are beautifully illustrated and feature creatures from aberrations to dragons and fey to undead ranging from Level 0 to 21, so you'll always have a swarm perfect for your PCs no matter their level!