Black Soldier Fly Larvae
What Are BSFL?
BSFL stands for Black Soldier Fly Larvae.
They are the young, growing stage of the Black Soldier Fly, a species scientifically known as Hermetia illucens.
And before you think, "Isn't that just a maggot?" — no.
Black Soldier Fly Larvae are a completely different insect from the larvae of common houseflies and other nuisance flies. Black Soldier Flies are not the kind of flies you normally find buzzing around your kitchen or garbage can.
The larvae are the part of the insect that does the work.
They eat.
They grow.
They consume organic material.
And they turn that material into valuable insect biomass that can be used as animal nutrition.
That is what makes BSFL so interesting.
Think of BSFL as Nature's Tiny Recycling Machines
A simple way to understand BSFL is this:
They eat suitable organic material and turn it into something useful.
As the larvae grow, they consume and process organic feedstocks. A portion of what they consume becomes the larvae themselves — their bodies become a concentrated package of nutrients including protein, fat and minerals.
The rest of the process produces another valuable material called frass.
So one biological process produces two useful products:
Organic Resources → BSFL → Animal Nutrition
Organic Resources → Frass → Soil
That is the basic idea behind what we do at The Grub Forge.
Nellie's describes its own production process in similar terms: larvae are raised on managed organic feedstocks, then the larvae, protein and frass are harvested and prepared as useful products.
Why Are BSFL So Valuable?
BSFL are valuable because insects are naturally part of the diets of many animals.
Chickens eat bugs.
Wild birds eat bugs.
Reptiles eat bugs.
Fish eat insects and insect larvae.
Insects are a natural source of nutrients, and BSFL are particularly interesting because they can provide protein, fat and minerals in a compact package.
Whole larvae can be used as a supplemental food or treat for appropriate animals, while processed BSFL ingredients can be incorporated into certain animal-feed applications.
Nellie's currently markets whole BSFL for poultry, reptiles, wild birds and specialty-feed programs, while its processed BSFL protein is marketed for poultry, aquaculture, pet nutrition and feed trials.
What Is In a BSFL?
Like other insects, BSFL contain a combination of nutrients that animals can use.
Depending on how the larvae are raised and processed, BSFL can provide:
-
Protein
-
Fat
-
Energy
-
Calcium
-
Phosphorus
-
Other minerals
-
Amino acids
-
Chitin, a natural structural material found in the exoskeleton of insects
The exact nutritional composition is not identical from one BSFL product to another. What the larvae are fed, how they are raised, and how the finished product is processed can all affect the final nutritional profile.
That's why responsible production and consistent feedstocks matter.
Why Do Chickens Love BSFL?
Chickens are natural foragers.
In the wild, they spend a lot of time scratching around looking for insects, worms, seeds and other food.
Give a chicken a pile of live BSFL and you are giving it more than something to eat.
You're giving it something to hunt for.
They scratch.
They peck.
They chase.
They forage.
And they get a nutrient-rich insect treat at the same time.
BSFL can therefore serve both as a supplemental food and as feeding enrichment.
That natural behavior is one reason live BSFL are so popular with backyard poultry owners.
BSFL for Reptiles
Many reptiles are insect eaters.
For reptile keepers, BSFL provide another convenient feeder-insect option.
They can be used with appropriate insect-eating reptiles as part of a varied feeding program.
BSFL are especially useful because they can be offered without the hassle of maintaining large colonies of some traditional feeder insects.
As always, the appropriate food, quantity and feeding schedule depends on the animal species and its nutritional requirements.
BSFL for Wild Birds
Birds eat insects naturally.
Insects are an important part of the diet of many wild bird species, particularly during periods when birds are feeding growing young.
Dried BSFL can be offered through bird feeders or mixed into appropriate bird-feeding programs to provide an additional insect-based food source.
Nellie's specifically lists wild birds among its whole-BSFL applications.
BSFL for Fish and Aquaculture
Insect protein is also becoming increasingly interesting as an ingredient in animal nutrition.
BSFL protein can be used in certain poultry, aquaculture, pet-nutrition and specialty-feed applications.
The basic idea is simple:
Instead of relying entirely on conventional protein sources, insects provide another way to produce useful animal protein.
Nellie's currently identifies aquaculture and feed trials among its BSFL protein applications.
How Are BSFL Made?
Technically, we don't "make" BSFL.
We raise them.
Black Soldier Flies naturally produce eggs. Those eggs hatch into larvae.
The larvae enter their feeding and growing stage.
This is when they become extremely valuable.
Step 1 — Eggs Hatch
Black Soldier Fly eggs hatch into tiny larvae.
Step 2 — The Larvae Eat
The young larvae begin consuming suitable organic feedstocks.
Step 3 — The Larvae Grow
As they eat, they grow rapidly and accumulate nutrients in their bodies.
Step 4 — We Harvest Them
When the larvae reach the appropriate stage for their intended use, they can be harvested.
They can then be sold as whole live larvae or processed into other insect products.
Step 5 — Frass Is Collected
The process also produces frass.
Instead of throwing that material away, it can be recovered and processed as another valuable product.
That means the process doesn't have to end when the larvae are harvested.
The larvae become animal nutrition.
The frass becomes a soil product.
Why Does This Matter to the Planet?
This is one of the biggest reasons we believe BSFL are worth paying attention to.
We live in a world where enormous amounts of organic material are discarded every day.
Food scraps.
Agricultural residues.
Organic processing materials.
Other suitable biological materials.
Once these materials enter a traditional waste stream, much of their potential value is lost.
BSFL offer another possibility.
Recover the resource.
Feed it to the larvae.
Grow the larvae.
Harvest the nutrition.
Return the frass to the soil.
That is a much more circular way of looking at organic resources.
BSFL and the Circular Economy
A circular system tries to keep useful resources in use rather than constantly extracting new resources and throwing old resources away.
BSFL fit naturally into this concept.
Instead of thinking:
Organic material → Trash
we can think:
Organic material → BSFL → Animal nutrition
while also producing:
Organic material → Frass → Soil → Plants
That creates a connection between waste reduction, animal nutrition and agriculture.
It's not magic.
It's biology.
And the insects are doing much of the work.
What Can You Use BSFL For?
Depending on the form of the product and the animal, BSFL can be used for:
-
Backyard chickens
-
Poultry
-
Ducks
-
Reptiles
-
Wild birds
-
Fish
-
Aquaculture
-
Insect-eating pets
-
Specialty animal feeding
-
Animal enrichment
-
Animal-feed ingredients
Whole larvae and processed insect protein are not interchangeable products, so the appropriate product depends on what you're feeding and how you're using it.
Why The Grub Forge?
At The Grub Forge, we don't look at BSFL as just another feeder insect.
We see them as part of a much bigger system.
We raise insects that can provide valuable nutrition to animals while creating another useful product — frass — that can return nutrients and organic material to the soil.
One insect.
Two valuable products.
Less wasted potential.
That's what makes BSFL so exciting to us.
Small Insects. Big Job.
BSFL may be tiny, but they can play a surprisingly large role in the future of animal nutrition, resource recovery and sustainable agriculture.
They eat organic resources.
They become nutritious animal food.
They produce frass.
And frass goes back to the soil.
That's the cycle we're building at The Grub Forge.
Quality forged from nature. Value returned to the earth.