What are all of these entities

[Thehungrycamel]

My game says it has about 700 entities and it's only letting me get about 70 FPS. There are no dungeons or excess of mobs anywhere, all I have is a large cobble factory of about 4 block breakers in each cell, and 5 cells pumping the cobble through redpower pipes into a condenser. What are all of these entities?

[BLAZE MkIV]

Mostly mobs, if it reaches 3-4000 and your fps drops to 5 then you may have a problem.

[Thehungrycamel]

Mostly mobs, if it reaches 3-4000 and your fps drops to 5 then you may have a problem.

But there's a relatively low cap limit for hostile mobs and my passive mob population is well controlled...

[The Merchant of Menace]

"only 70fps"

I get about 20 fps, at best :P