Just some ideas I thought I'd share.

[xc3llous]

List of ideas

Nurse ant - Heals near by ants

Flying ant 

Ant queen(boss) - Supported by nurse ants and warrior ants

Bullet ant - More dangerous type of ants and a little bigger

Ambush spider

Huntsman spider

Jumping spider

Brown recluse spider

Daddy Long leg

June bug

Centipede

Stag beetle

Darkling beetle

Bullfrog

Garden Snake

king snake

Worms

Wasp

weather that may increase thirst or lower your health - snow, rain, heat wave

Probably the most deadliest of them all.. the squirrel or cat (just for giggles)

Dual swords

Great Hammers

Great swords

Knuckles

Claws

Healing staff

Long bow

Compound bow