Minecraft – Can creepers destroy spawners

The same rules apply to Monster Spawners as to the natural spawning of the mob in question, with two exceptions:

1. Ordinarily, hostile mobs will never spawn next to the player, but with spawners they can.
2. Natural spawns require ground underneath the mob, but Monster Spawners can create monsters in midair.

It is also important to understand the effect of light level: what is relevant is not the light at the spawner but the light at the location where the mob spawns, so putting a torch on the spawner is just a way to center the light, not inherently good — and is in fact inadequate to light up the full spawning range to level 8, though it happens to be sufficient for many natural dungeons. The actual requirement for safety is that the full spawning area (8×8 × 3 high box centered on the spawner's low-coordinate corner) is sufficiently lit (or does not have valid locations to spawn, e.g. is filled solid).

In your case, where you have two spawners right next to each other, there is no way to spawn just the skeletons except by lighting or filling up with blocks the entire spawn volume of the cave spider spawner, leaving you with just a thin slice of skeleton spawner volume (which will therefore have lower spawning rates).

Another possibility would be to construct a sorting system which separates the skeletons from the cave spiders, but I don't know of a particular design to suggest. Cave spiders are particularly difficult to handle because of their small size and ability to climb.

A list of things to help with creepers:

• Light up the outside yard to reduce the chance that a creeper can spawn and randomly walk into awareness range
• Always allow your entrances to have a clear view of the outside area so you can see what is there.
• Always use those clear views to check for creepers.
• When you leave your house, dash.. Get some good distance between you and the house. (While not directly a building thing, this is more of a consideration to make sure You can run some where :))
• Always -always- have more than one exit from a place. Preferably on different sides of the house/dwelling/whatever.
• Creepers can not blow up Obsidian blocks (but obsidian is a pain in the ass to build with)
• Creepers will still damage you but not blocks if they are in water, even in a stream of water seems to work with this.. However its quite a bit more of a pain in the ass than building in obsidian to build things with water covering all/most of it.
• Become that creepy person with tons of cats around.. But also be aware they will not halt/hinder/interrupt an already hissing creeper.

At the end of the day just putting up enough torches and making sure you can see whats around the doors is your best bet. There really is no way to make a house creeper proof. If it can get to where you are and you are next to your house, chances are it will blow up and take something with it.