Spelunky Wiki

Skeletons are weak enemies that randomly appear in all areas of the dungeon.

While inactive, they are indistinguishable from the harmless piles of bones that may also be found, but will rise if a Spelunker approaches one of them in the horizontal distance of (inclusively) the limit of 3 blocks, either in the same height or below, to (inclusively) the limit of 2 blocks of vertical distance.
It is prudent to always treat piles of bones as if they were Skeletons so as never to be caught by surprise. Undead Skeletons lying in wait can easily be dealt with by either jumping onto bone piles or approaching slowly. It is worth noting that Skeletons do not give of blood when they die, and thus do not fill the Kapala.

Skeletons are 'blind' and will always walk directly forwards, regardless of their surroundings. They will walk off ledges and only change direction when they reach a wall. Because Skeletons cannot jump, this behaviour often leads them to get trapped in pits.

Skeletons that have been awoken will revert to their inactive state if they wander too far from the Spelunker or fall into a single tile wide hole.

Within the Jungle and the Ice Caves special caution must be taken as they can be almost invisible depending on the terrain on which they spawn.

Spelunky HD Monsters
The Mines SnakeCobraBatSpiderSpinner SpiderGiant SpiderScorpionCaveman
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Haunted Castle Jiang ShiGreen KnightBlack KnightVampire
Worm BacteriumWorm EggWorm Baby
Ice Caves YetiYeti KingMammothAlienUFOAlien Lord
Mothership AlienUFOAlien TankAlien LordAlien Queen
Temple CobraScorpionCavemanHawk ManCroc ManMagma ManScorpion FlyMummyAnubis
City of Gold Anubis II
Olmec's Lair Olmec
Hell BatJiang ShiVampireMagma ManVladImpDevilSuccubus
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Miscellaneous SkeletonDamselShopkeeperTunnel ManScarabGolden MonkeyGhost
No Journal Entry CrittersHired Hand