For maggots you will need poultry dropings or cow-dung, hay or grass. Bucket. Punch holes on the sides of the bucket, put layer of grass at the bottom, spread dug/ droppings on top. Repeat the process untill the bucket is full. Sprinckle water on the top, keep the content moist as you wait for the flies to lay eggs that will hatch to maggots. The maggots will drop off the bucket through the holes. You can collect and feed the birds or let the birds pick them.