Invertebrate species live in almost every habitat on the planet in what can sometimes be astonishing numbers.
They may be spineless, but they're some of the hardiest creatures on Earth.
Insects represent over half of all known living organisms.
Butterflies and moths are some of the most beautiful creatures on the planet.
Life in the Undergrowth explores the creepy crawly side of life.
Arachnophile or arachnophobe? Maybe fear will drive you to do well in our fiendish quiz!