Dried mealworms in an EZ to use block High protein mealworms attract insect eaters you won't see at your seed feeders, such as bluebirds, catbirds, mockingbirds, orioles and robins. 7 oz. Mealworm To Go Cake fits in any standard size suet cake holder. 4-1/2 x 4-1/2 x 1-1/4 inches. Contains mealworms and sunflower heart chips.