BATTLE OF THE BUGS: BLACK SOLDIER FLY LARVAE VS. MEALWORMS
For many reptile, amphibian and mammal species, insects are the bee’s knees when it comes to nutritious protein sources (excluding bees, of course). But no two feeder insects are created equal, and some are better for your pet than others. Today, we’re pitting the colossus of calcium clout, black soldier fly larvae, against the wriggly but mighty mealworm. Which one will win the number one spot on your pet’s plate?
MEALWORMS: THE OG GRUB
Mealworms, or or darkling beetle larvae, are a popular feeder insect. They are sold in multiple sizes. (The really big “superworm” is also a darkling beetle larvae, but it’s a different species than the mealworm.) As adults, they’re considered pests because they love to snack on grains, cereal, and flour.
Like black soldier fly larvae, they are vorcious eaters, love to burrow, and make for a tasty, protein-packed snack. But their nutritional component differs from BSFL. While they’re made up of about 20% protein, they only contain 0.17-1.0% calcium, a mineral that is extremely important to a reptile’s digestion and bone health. Mealworms must be “gutloaded,” or fed calcium rich feeder food, or dusted with calcium before feeding to your pet.
BLACK SOLDIER FLY LARVAE: LEAN, MEAN, NUTRIENT MACHINES
Black Soldier Fly Larvae are near and dear to our hearts, and for good reason. As feeder insects, not only are they cute-as-buttons (hey, we said we’re biased), they’re easy to keep, since they don’t try to escape their containers, as other feeder insects do. Like mealworms, they’re sold in a variety of sizes and last a long time before they begin to pupate. They also let you know when they’re about to ‘expire,’ turning black before they begin to transition into the next stage of life.
When it comes to nutritional benefits, BSFL score the KO. They have an extremely high calcium content (some sources say up to 80 times that of other feeder insects) and don’t require gutloading or dusting before feeding to your scaly friend. Because thye’re also low in fat, they are the G.O.A.T. snack for healthy growth and development. And, they’re super convenient to purchase!
PROS AND CONS OF MEALWORMS
Pros
- High in protein
- Don't bite or fly, and can eat food waste scraps
- Contain essential amino and fatty acids
Cons
- Can be difficult to digest, which can lead to constipation or impaction
- High fat content can lead to unhealthy weight if overfed
- Can carry harmful bacteria and parasites, especially if colonies are not kept dry
- Can be difficult to store and may require special housing and feeding practices
PROS AND CONS OF BSFL
Pros
- High in calcium, promoting strong bone health
- Low in fat, supporting lean growth
- Easy to store and maintain
- Last a long time before pupating
- Softer and easier to digest
Cons
- Might not stimulate hunting instincts as much as live, moving prey
- Some reptiles may initially be hesitant to eat them due to softer texture
- Can produce noticeable smell if not kept clean
WHO'S THE WINNER?
Both mealworms and black soldier fly larvae offer different dietary benefits to your reptile. While BSFL are clearly the winner in the calcium department (did we mention cuteness department as well?), which feeder insect is right for you and your pet boils down to your reptile’s specific needs and what is convenient for you. Some reptiles are picky eaters and may choose for you. It’s also worth noting that reptiles need a variety of food sources, just like they would find in the wild. Imagine only eating peanut butter sandwiches as your protein source day in and day out.
As always, do your research to learn what your specific species of reptile requires, and consult with your veterinarian before making any major changes in their diet. Bon appétit!