What do bedbugs on a chicken look like?

What do bedbugs on a chicken look like? - briefly

Infesting poultry, bedbugs appear as tiny, reddish‑brown, oval insects about 4–5 mm long with a flattened dorsal surface and faint dark spots on their backs. They are commonly found clinging to the skin, under feathers, or around the vent area.

What do bedbugs on a chicken look like? - in detail

Bedbugs that infest chickens are the same species that attack humans (Cimex lectularius) but may appear slightly larger due to a blood‑rich diet. Adult specimens measure 4–5 mm in length, about the size of a grain of rice, and have a flattened, oval body that expands after feeding. The exoskeleton is a matte, reddish‑brown hue when unfed; after a blood meal it becomes a darker, almost black shade, with a glossy sheen on the dorsal surface.

Key morphological features include:

  • Head: small, concealed beneath the thorax, equipped with piercing‑sucking mouthparts (a beak‑like proboscis) used to penetrate skin.
  • Antennae: five segmented, slender, and lightly pigmented, positioned near the front of the thorax.
  • Thorax: robust, bearing three pairs of legs adapted for rapid crawling on feathers and skin.
  • Abdomen: segmented, capable of expanding up to twice its original size after engorgement; the dorsal plates (tergites) display faint, parallel ridges.

Nymphs, which pass through five developmental stages, are smaller (1–3 mm) and lighter in color, ranging from pale yellow to light brown. They lack the fully developed wings of adults but retain the same general shape.

Visible signs on a chicken include:

  • Small, dark specks on the ventral surface, especially around the neck, under the wings, and near the vent, where the insects congregate.
  • Red or brown spots on the skin indicating recent feeding; these may appear as tiny puncture marks that swell into tiny bruises.
  • Molted exoskeletons (exuviae) that are translucent and often found in the litter or nesting material.
  • Increased scratching or feather ruffling, a behavioral response to irritation.

When examined under magnification, the bedbug’s pronotum (the shield‑like plate behind the head) shows a distinct, slightly concave margin, and the legs end in tiny claws that grip feather barbs. The insect does not possess wings for flight; movement is limited to crawling, which allows it to navigate the dense plumage of poultry.

Overall, the combination of size, reddish‑brown coloration, flattened oval body, and characteristic mouthparts distinguishes these parasites on chickens from other common ectoparasites such as lice or mites.