Giant Dragonfly (CR 1)

Large Vermin
Alignment: Always neutral
Initiative: +1 (Dex); Senses: darkvision 60 ft. and Spot +7

AC: 14 (-1 size, +1 Dex, +4 natural), touch 10, flat-footed 13
Hit Dice: 3d8+3 (16 hp)
Fort +4, Ref +2, Will +2
Speed: 20 ft., fly 60 ft. (good)
Space: 10 ft./5 ft.
Base Attack +2; Grapple +1
Attack: Bite +5 melee
Full Attack: Bite +5 melee
Damage: Bite 1d8+6
Special Attacks/Actions:
Abilities: Str 18, Dex 12, Con 13, Int -, Wis 12, Cha 12
Special Qualities: Vermin
Feats: -
Skills: Hide -3, Spot +7, and Survival +7
Advancement: 4-6 HD (large); 7-9 HD (Huge)
Climate/Terrain: Temperate and warm aquatic and marsh
Organization: Solitary, pair, or swarm (5-20)
Treasure/Possessions: None

Source: Arms and Equipment Guide

Raiders and bandits who ride flying vermin prefer giant dragonflies to other mounts. They're less aggressive than wasps but more so than bees. They also make a distinct thrumming sound in flight that strikes fear into common folk.

Riders prefer to use female dragonflies, since males are very territorial. A giant dragonfly is 10 feet long with a 10-foot wingspan. Its body is only 2 feet wide.