Telecanter recently posted on One Sentence Monsters, so here’s the write-up of a monster I’m planning to include in the Forbidden Jungle:
Spider monkeys with the feathered wings of large birds, winged monkeys can be cowed into servitude by powerful wizards or witches.
No. Enc.: 1d6 (4d8)
Movement: 90 (30)
Flying: 150 (50)
Armor Class: 5 
Hit Dice: 1+1
Attacks: 1 (bite)
Morale: 7 (but see below)
Hoard Class: XX
Winged monkeys are normal-sized monkeys with feathered wings. They generally live in large groups and favor jungles and ruined cities. Clans will be led by a 2 HD winged monkey or perhaps a flying ape.
Winged monkeys have a great fear of magic, suffering a -2 penalty on morale checks when spectacular displays of sorcery, such as lightning bolt or fireball, are involved. This fear leads many of these creatures to become enslaved by powerful wizards and witches out of fear.
Though timid and easily frightened off, they gain a +2 modifier to morale checks when carrying out the orders of a leader because they fear angering their lord.
One winged monkey can carry about 75 pounds, but two or three of them can work together to carry more.