I had Originally purchased the Black Fly Larva as my feeder choice but the birds didn’t seem overly interested in them ( An ole Possum would climb up the pole and devour them with his free arm/hand & my dogs would gobble them up when I eventually emptied the box onto the ground; But, “No Birds”) Then I replaced them with these Dried Meal Worms and I can’t keep the feeder filled “They are a Birdie Hit” !!!!!!!!!!