Botfly Swarm

Like a cloud of black dust, a swirling swarm of insects hovers in the air. From within comes the low, droning buzz of thousands of tiny flies.

Botfly Swarm CR 4

XP 1,200
N Fine vermin (swarm)
Init +0; Senses darkvision 60 ft.; Perception +0

AC 18, touch 18, flat-footed 18 (+8 size)
hp 40 (9d8)
Fort +6, Ref +3, Will +3
Defensive Abilities swarm traits; Immune mind-affecting effects, weapon damage Weaknesses swarm traits

Speed 0 ft., fly 60 ft. (good)
Melee swarm (2d6 plus infestation)
Space 10 ft.; Reach 0 ft.
Special Attacks disease, distraction (DC 14), suffocation

Str 2, Dex 11, Con 10, Int â, Wis 11, Cha 2
Base Atk +6; CMB â; CMD â
Skills Fly +12

Infestation (Ex)

A living creature injured by a botfly swarm’s attack must make a DC 14 Fortitude save or be infested with the swarm’s larvae. The larvae may be cut out of the host with a DC 15 Heal check, though each attempt inflicts 1d8 points of damage whether or not it’s successful. A remove disease spell destroys all larvae without further harm to the host.

Environment warm jungles and swamps
Organization solitary or colony (2-20 swarms)
Treasure none

Common to sweltering jungles, warm swamplands, and lazy riverbanks, these pestilent fly swarms seek humanoid hosts for their eggs. While not as physically dangerous as their giant cousins, implanted botfly larvae typically carry diseases that spread to the host.

Infestations

Parasites such as botfly larvae cause infestations, a type of affliction similar to diseases. Infestations can only be cured through specific means; otherwise, no matter how many saving throws are made, the infestation continues to afflict the target. While a remove disease spell (or similar effect) instantly halts an infestation, immunity to disease offers no protection, as the infestation itself is caused by parasites.