Left: The Common Mealworm should not make
up a large portion of the diet. Image by MarioM.
Source: Creative Commons (https://creativecommons.org/
licenses/by-sa/3.0/deed.en).
Below left: Black Soldier Fly larvae are extremely
high in calcium. Image by Dennis Kress.
Source: Wikimedia Commons (MD-Terraristik – Laut [1] ist
Dennis Kress Mitinhaber des Unternehmens).
Bottom: silkworms are also one of the most
nutritious feeder insects available.
or remove the head of a mealworm before
feeding it to your reptile or amphibian.
Giant Mealworm (Zophobas morio).
The giant mealworm is another mealworm
alternative and is a great supplementary
food for large dragons and monitors. With a
slightly better calcium to phosphorous ratio
than the common mealworm, these insects
should still only be fed in moderation. Giant
mealworms must not be stored in the fridge,
unlike the common mealworm, as they do
not tolerate cooler temperatures and will
die.
Mealworms.
Common Mealworm (Tenebrio molitor).
Mealworms are yet another widely used
and commonly available live insect food
source. However, they should not make up
a large portion of any reptile or amphibian’s
diet due to their limited nutritional value.
Mealworms are very high in fat, low in
calcium (1:7) and have a hard, indigestible,
chitinous exoskeleton. Mealworms should
only ever be offered as a treat to your
reptiles and never fed to young or very
small animals. Many lizards will eagerly
take mealworms, but if overfed they may
become obese and there is also risk of
impaction due to a build up of chitin in the
digestive tract. There is a common myth
that mealworms can chew their way out of
the stomach of an animal once consumed.
This is untrue and there is no need to crush
Silkworms.
Silkworms are one of the most nutritious feeder
insect options available to any reptile or amphibian
keeper in Australia. The superior nutritional content
of silkworms should never be underestimated as
they offer the perfect variety of vitamins and miner-
als in a neat, easily-digestible package. Silkworms
are very high in calcium, protein, magnesium, iron
and sodium, as well as vitamins B1, B2 and B3.
Furthermore, silkworms are low in fat and do not
have a hard exoskeleton like many other live feeder
insects, so they can be fed to animals of any age or
size. An enzyme found in silkworms called
serrapeptase has many beneficial properties and
promotes increased calcium absorption and the
breakdown of arterial plaque, as well as acting as
an anti-inflammatory agent.
Black Soldier Fly larvae.
When it comes to live feeder insects, the Black
Soldier Fly larvae (BSFL) takes out the number one
spot. These insects have only become readily avail-
able to Australian hobbyists in recent years but can
now be purchased from good specialty reptile stores
and online. The larvae are extremely high in calcium
and are the only feeder insect that naturally offers
the perfect calcium to phosphorous ratio. BSFL are
very high in protein and low in fat, resulting in accel-
erated growth rates for any animal fed on a diet of
these grubs. They also contain lauric acid, which