Wormlion

I have seen similar pits under the hostel building when I was in
Kuching, and again, in Tawau. I thought they were antlion pits at
first, but upon investigation, turned out to be something else. No
antlion larva inside, just a worm! See how this wormlion deals with an
ant that falls into the pit! The worm looks like this: I posted the gif
animation on my Facebook and within minutes, got the