"F" is for "Featherfear"

Featherfear

No. Enc.:  1 (1d3)
Alignment:  Chaotic
Movement:  90' (30')
         —Fly:  120' (40')
Armor Class:  4
Hit Dice:  9
Attacks:  3 (2 claws, 1 peck)
Damage:  2d6 / 2d6 / 1d8
Save:  L7
Morale:  12
Hoard Class:  XV
XP:  1,820

Featherfears are man-sized, metal-plumed birds that combine amazing resistance to harm and blind, insensate wrath into one ferocious package.  The brutes disembowel with wicked, 2' long talons, and eat their suffering victims alive.

Sadistically, a featherfear can shapeshift into any basic (albeit man-sized) animal—spider, snake, rat, scorpion, etc.—that most terrifies its prey.  The bird knows instinctively what form induces maximum panic in its chosen target.  [Treat the altered form as having the same stats, damage output, and mutations.]

Surviving combat with a featherfear—not actually defeating it, just surviving the encounter—is a rite of passage in many backwoods Mutant Future cultures.

Mutations:  Atrophied Cerebellum [D], Beguiling, Force Screen, Metamorph (Modified), Natural Armor (Extreme), Regenerative Capability