Werewolves are found in Canifis. They have low defence for what their combat level suggests. They appear as normal humans until they are attacked in which they transform into level 88 werewolves, unless the player wields a wolfbane dagger, in which case they remain human. In either case they drop wolf bones. They can hit up to 8 as a werewolf, and up to 2 as a human. If you are a lower level player (70-) training on them you may want food as their attacks are accurate.
They only count towards Slayer tasks and exp when killed in the "wolf" form, not their human forms. There is a strategy that can work to reduce damage when killing these for slayer, though. Start the fight with the wolfbane dagger equipped, then when the werewolf's health is low, switch to a different weapon. It will regain some health in the transformation to wolf form, but still be low, and will ultimately cause less damage than fighting as a wolf the entire time.
You can safespot werewolves if you stand behind the bar in the pub in Canifis, or across the two tables. There are 4 werewolves inside the bar.
Item Quantity Rarity GE market price Wolf bones 1 Always 482
Item Quantity Rarity GE market price Steel scimitar 1 Common 71 Steel axe 1 Common 26 Steel full helm 1 Uncommon 146 Mithril chainbody 1 Uncommon 884 Mithril sq shield 1 Uncommon 682 Rune med helm 1 Rare 11,084
Item Quantity Rarity GE market price Coins 10; 90; 100; 120; 222; 364 Common Not sold Fur 1 Common 137 Grey wolf fur 1 Common 31 Jug of wine 1 Common 3 Raw chicken 2; 5 Common 138–345 Raw bear meat 5 Common 555 Raw beef 2; 5 Common 138–345 Vial 1 Uncommon 3 Ecumenical key 1 Uncommon (1/60) Not sold Herb 1 Uncommon Not sold Clue scroll (medium) 1 Rare Not sold