Yes, but usually they only eat the shed skin of other roaches.
Yes
I do know that chickens love to eat cockroaches. I am not sure of other predators.
cockroaches, crickets, and other small insects.
what does the cockroach eat
Yes, geckos do eat cockroaches as part of their diet.
Yes, cockroaches will eat an onion. The cockroach will feeds on almost anything that is left out on a counter.
I would look for other solutions to your problem. Bringing seagulls into you home would make a bigger mess than the cockroaches do. I would start by cleaning your house, then calling an exterminator.
White glue or carpenter's glue (you may know it as Elmer's glue) is made from protein, and therefore can be eaten by cockroaches. There are other kinds of glue which are not edible even by cockroaches.
Try re-typing your question so I can give you an accurate anwser.
They eat Rice sambar
Yes, house lizards commonly eat cockroaches as part of their diet.
anything!