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Botfly, Giant Botfly

This foot-long, gray-and-black-striped insect looks like a cross between a bee and fly, with an oversized head and bulbous eyes.

Giant Botfly CR 1/3

Source Heart of the Jungle pg. 59
XP 135
N Tiny vermin
Init +2; Senses darkvision 60 ft.; Perception +0


AC 14, touch 14, flat-footed 12 (+2 Dex, +2 size)
hp 4 (1d8)
Fort +2, Ref +2, Will +0
Immune mind-affecting effects


Speed 5 ft., fly 60 ft. (good)
Melee sting +4 (1d2-4 plus infestation)
Space 2-1/2 ft., Reach 0 ft.
Special Attacks infestation


Str 2, Dex 14, Con 10, Int —, Wis 11, Cha 2
Base Atk +0; CMB +0; CMD 6
Feats Weapon FinesseB
Skills Fly +10, Stealth +12; Racial Modifiers +4 Stealth


Environment warm jungle
Organization solitary, pair, or colony (10-30)
Treasure none

Special Abilities

Infestation (Ex) Upon each successful sting attack, the giant botfly implants an egg in the victim subcutaneously. Each implanted egg reacts to the warmth of the victim’s body, triggering its hatching. One day later, the egg releases a pupa that devours the host’s flesh as it develops, growing to the size of a small mouse, at which point it reaches its larval stage. If left untreated, the larva continues to develop until it kills the host or 1 week has passed, at which point it burrows out of the body and drops to the ground, where it transforms into an adult giant botfly. Individual larvae may be squeezed or cut out of the host with a DC 10 Heal check, though each attempt inflicts 1d4 points of damage whether or not it’s successful. A cure disease spell destroys all larvae without further harm to the host.

Giant botfly larvae: infestation; save Fort DC 10; onset 1 day; frequency 1/day for 1 week; effect 1 Con damage per larva.


Botflies are perhaps the most disgusting vermin native to the Expanse. Explorers tell sickening tales of removing maggots from living hosts—or worse, comrades eaten alive by larvae. Once a botfly finds a warm-blooded host, it uses its proboscis to insert eggs into the host’s flesh. When the eggs hatch, the larvae feed upon the host until they mature into adult flies and exit.

Creatures in "Botfly" Category

Botfly Swarm4
Giant Botfly1/3