Bed Bug

Bed Bug facts at a glance

How big is a bed bug?

An adult bed bug measures 1 cm long — a small fraction of the height of an average adult person (1.73 m) — and weighs around 0 g, a small fraction of an average adult’s body weight (70 kg).

What is a group of bed bugs called?

Explore more animal collective nouns and baby animal names .

Nocturnal blood feeding

Bed bugs emerge from hiding in darkness, attracted by carbon dioxide and body heat. They pierce skin with elongated mouthparts, feed for 5–10 minutes, then retreat to cracks. Bites often appear in lines or clusters but reactions vary — some people show no marks.

Resurgence and resistance

Bed bugs nearly disappeared in wealthy countries after DDT use mid-century but resurged since the 1990s with international travel, pesticide resistance, and reduced use of broad-spectrum insecticides. They spread via luggage, furniture, and clothing.

Detection and treatment

Signs include rusty spots (faecal stains), shed skins, and a sweet musty odour in heavy infestations. Heat treatment above 50°C kills all life stages. Professional extermination often combines heat, steam, encasements, and targeted insecticides.

Health impacts

Bed bugs are not known to transmit disease to humans despite blood feeding. Bites cause itching, allergic reactions, and psychological distress — anxiety and sleep loss are common during infestations. Not Evaluated by IUCN as a human-associated pest.

Did you know? Bed Bug facts

• The common bed bug is a small flat insect that feeds exclusively on blood, mainly from humans at night while they sleep.
• No confirmed disease transmission to humans — unlike ticks or mosquitoes. The main harm is itching, allergic reaction, and psychological stress.
• They hitchhike on luggage, used furniture, and clothing from infested hotels, homes, or public transport. They do not arrive from poor hygiene alone.
• No — they have no wings and cannot jump. They crawl between rooms and spread through walls and pipes in multi-unit buildings.
• Professional heat treatment, steam, mattress encasements, and targeted pesticides. Washing bedding at high heat helps but rarely eliminates infestation alone.
• Conservation: Not Evaluated (IUCN).

Diet & feeding

Bed Bug feeds primarily as a blood — primarily human; also bats and birds in wild settings. Bed bugs emerge from hiding in darkness, attracted by carbon dioxide and body heat. They pierce skin with elongated mouthparts, feed for 5–10 minutes, then retreat to cracks. Bites often appear in lines or clusters but reactions

Adaptations

• Bed bugs emerge from hiding in darkness, attracted by carbon dioxide and body heat. They pierce skin with elongated mouthparts, feed for 5–10 minutes, then retreat to cracks. Bites often appear in lines or clusters but reactions vary — some people show no marks.
• Bed bugs nearly disappeared in wealthy countries after DDT use mid-century but resurged since the 1990s with international travel, pesticide resistance, and reduced use of broad-spectrum insecticides. They spread via luggage, furniture, and clothing.

Behaviour & ecology

• Bed bugs emerge from hiding in darkness, attracted by carbon dioxide and body heat. They pierce skin with elongated mouthparts, feed for 5–10 minutes, then retreat to cracks. Bites often appear in lines or clusters but reactions vary — some people show no marks.
• Bed bugs nearly disappeared in wealthy countries after DDT use mid-century but resurged since the 1990s with international travel, pesticide resistance, and reduced use of broad-spectrum insecticides. They spread via luggage, furniture, and clothing.
• Signs include rusty spots (faecal stains), shed skins, and a sweet musty odour in heavy infestations. Heat treatment above 50°C kills all life stages. Professional extermination often combines heat, steam, encasements, and targeted insecticides.

Communication

• Bed Bug uses scent, posture, and vocal signals to mark territory and coordinate social behaviour.
• Communication intensity often peaks during breeding seasons and territorial disputes.

Habitat & range

Human dwellings, hotels, dormitories, and bedding worldwide

Ecological role

Bed Bug participates in pollination, decomposition, or prey-base support for birds and other insectivores.

Conservation status of the Bed Bug

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Bed Bug:

• IUCN Red List of Threatened Species

  Conservation status (Not Evaluated) reflects the IUCN Red List category for Cimex lectularius.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Cimex lectularius. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Cimex lectularius. Explore published occurrence records used in range research.

• IUCN Red List — Cimex lectularius.

  Conservation status (Not Evaluated) and population trends.

• Animal Diversity Web — Cimex lectularius. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Wikipedia — Bed Bug.

  General taxonomy and overview (cross-check primary sources).

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.