The Arctic woolly bear (Gynaephora groenlandica) takes 7 YEARS to grow up — surviving multiple winters frozen because each Arctic summer is too short to feed enough.
Hercules beetle larvae spend 1–2 years inside rotting logs and can grow to over 100 grams before pupating.
Adult lifespan is exactly one week. Everything they have to do — find a mate, lay eggs — happens in seven days.
In captivity these roaches live 2–5 years — extreme longevity for an insect, and longer than most pet rodents.
Stag beetle larvae develop for 3-7 years inside rotting wood — one of the longest insect childhoods.
A Macrotermes queen lives 50 years and lays 30,000 eggs every day — making her possibly the longest-lived insect on Earth.
Larvae spend 1-3 years in the pit before pupating — most of their life is the ambush phase.
