I know this sounds bizarre but I have a large room with free roaming parakeets and reptiles. I also have my Madagascar hissing cockroach roach aquarium in the room. The lid was accident damaged and the roaches stay put but until it was repaired I found the parakeets in the the aquarium eating the smaller bugs. Now that there is a stronger lid on there they are constantly trying to get in. They have an unending supply of seed and fruits and vegetables. There are also three waterfalls in the room. I put some baby mealworms down to see what they would do and they picked through the seed etc to eat them. Is this normal?