Hmm, although a "Cobrahawk" has possibilities...
Just for my own amusement, I combined an Advanced Bloodhawk with a Medium Viper Snake to get the following. It doesn't have any "fluff" or tactics, but those'd be easy enough to whip up.
Cobrahawk
Medium Magical Beast
Hit Dice: 2d10+2 (13 hp)
Initiative: +3
Speed: 20 ft. (4 squares), climb 20 ft., fly 50 ft. (poor), swim 20 ft.
Armor Class: 16 (+3 Dex, +3 natural), touch 13, flat-footed 13
Base Attack/Grapple: +2/+3
Attack: Bite +5 melee (1d4+1) or claw +5 melee (1d4+1)
Full Attack: Bite +5 melee (1d4+1) or 2 claws +3 melee (1d4)
Space/Reach: 5 ft./5 ft.
Special Attacks: Poison, wounding
Special Qualities: Darkvision 60 ft., dire beast, ferocity, low-light vision
Saves: Fort +4, Ref +5, Will +4
Abilities: Str 13, Dex 17, Con 12, Int 2, Wis 12, Cha 5
Skills: Balance +7, Climb +11, Hide +7, Listen +4, Spot +7, Swim +9
Feats: Multiattack, Weapon Finesse (B)
Environment: Warm forests
Organization: Solitary, pair, or murder (3–12)
Challenge Rating: 1
Treasure: None
Alignment: Always neutral
Advancement: 3–6 HD (Medium-size)
Background.
COMBAT
Tactics.
Dire Beast (Ex): A cobrahawk has all good saves.
Ferocity (Ex): A cobrahawk is such a tenacious combatant that it continues to fight without penalty even while disabled or dying.
Poison (Ex): A cobrahawk has a poisonous bite that deals initial and secondary damage of 1d6 Con The DC 12 Fort save is Constitution-based.
Wounding (Ex): A wound resulting from a cobrahawk’s claw attack bleeds for an additional 1 point of damage per round thereafter. Multiple wounds from such attacks result in cumulative bleeding loss (two wounds for 2 points of damage per round, and so on). The bleeding can be stopped only by a Heal check (DC 15) or the application of any
cure spell or other healing spell (
heal, healing circle, or the like).
Skills: Cobrahawks have a +2 racial bonus on Hide and Listen checks, a +4 racial bonus on Balance and Spot checks and a +8 racial bonus on Climb checks. Cobrahawks use either their Strength modifier or Dexterity modifier for Climb checks, whichever is higher. A cobrahawk has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard. It can always choose to take 10 on a Climb or Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.