This creature has an owl's head and wings set on a cat's body.
CR 1; XP 400
N Tiny Magical Beast
Init +2; Senses darkvision 60 ft., low-light vision, scent; Perception +5
AC 14, touch 14, flat-footed 12 (+2 Dex, +2 size)
hp 13 (2d10+2)
Fort +4, Ref +5, Will +1
Defensive Abilities acrobatic flight, evasion
Speed 30 ft., fly 40 ft. (good)
Melee bite +6 (1d3–2), 2 claws +6 (1d3–2)
Space 2-1/2 ft.; Reach 0 ft.
Special Attacks pounce, rake (2 claws +6, 1d3–2)
Str 6, Dex 14, Con 12, Int 5, Wis 13, Cha 13
Base Atk +2; CMB +2; CMD 10 (14 vs. trip)
Feats Weapon Finesse
Skills Fly +14, Perception +5, Stealth +10
Language Common (can't speak)
Environment temperate forests, hills, and mountains
Organization solitary, pair
Acrobatic Flight (Ex) A gryphling can make Fly checks in place of Acrobatic checks to avoid attacks of opportunity, jump, and soften fall (even when it can't use its wings to negate falling damage).
Gryphlings are miniature version of griffons, curious, cute, capricious, and ferocious at the same time, taking on the best and the worst qualities of cats and owls. While they are intelligent beings capable of understanding speech, they have strong predatory instincts. While they don't live in packs, they can form strong bonds of loyalty with a single companion and caretaker, though they won't stand being treated badly.
Gryphlings are a valid Improved Familiar choice for spellcasters with 3 or more caster levels. Gryphling familiar's alignment reflects its master's alignment.