Quick answer
Bed Bugs feed on blood — primarily human; also bats and birds in wild settings, adjusting seasonally based on local habitat and prey or plant availability.
Diet overview
Bed Bugs are insects that rely on blood — primarily human; also bats and birds in wild settings. The common bed bug is a small flat insect that feeds exclusively on blood, mainly from humans at night while they sleep. Roughly 5 mm long and reddish-brown, it hides in mattress seams and furniture, resists many pesticides, and has resurged globally in hotels and homes — listed Not Evaluated by IUCN.
Feeding behaviour
Foraging strategy varies by season. Bed Bugs may hunt, graze, filter-feed, or scavenge depending on ecology.
Role in the food web
As insects, they interact with predators, prey, and competitors across their range.
Human-related feeding risks
Never feed wild bed bugs — it habituates animals to people and can spread disease.
Sources
FAQs
What do bed bugs eat?
Blood — primarily human; also bats and birds in wild settings.
Are bed bugs carnivores or herbivores?
Their diet is best described as: blood — primarily human; also bats and birds in wild settings.
Do bed bugs change diet seasonally?
Yes — many species shift food sources as seasons and prey abundance change.
Can I feed wild bed bugs?
No — feeding wild animals is unsafe and often illegal.