They are encountered in Blighttown. They spawn one at a time from a few pre-defined spawn-spots. These spots are often found in pairs, and sometimes alone. As soon as one is giant mosquito is killed, a new one will spawn in its place. Although it may seem like they respawn indefinitely, they'll stop respawning after 6 spawns (7 giant mosquitoes).
Giant Mosquitoes can sight their prey from far away. Once close, they spread blood into the air, which is a short ranged poisonous projectile; their sting is also poisonous.
Giant mosquitoes are not particularly difficult enemies. Their strongest skill is being very small, and weapons have a tendency to swing bellow them and miss. Weapons that swing vertically tend to hit more often, but will still miss frequently when the giant mosquito is too close. Ranged weaponry (bows, crossbows, magics) tend to very rarely miss, and is one of the most reliable way to kill them.
While their Poison blood causes relatively low Poison buildup and only 4 damage per second once contracted, their sting is considerably stronger, causing heavy buildup and 9 damage per second.
|Damage Types||Regular / Poison|
|Abilities||Can pass through the ground and thin walls.|
|Attack||Damage||Attack Type||Status Effect||Parryable||Tracking||Attack Speed|
|Physical Defenses||Elemental Defenses||Resistances|
These stats are sourced from FuturePress's Official Dark Souls Strategy Guide.
Prior to patch 1.04/1.05, killing Giant Mosquitoes yielded no souls.