Img 1 Flea larvae have dark red digestive tracks, which can be seen through their transparent cuticles. This can cause the larvae to appear black from a distance.
Flea larvae can appear black. However, upon closer inspection, they’ll actually be a dark red color. Larvae consume the blood feces of adult fleas. As a result, their guts take on a crimson color. Since larvae have transparent bodies, the red digestive track can be seen through it.
Vid 1 Video of cat flea larvae in carpeting. Their red guts can appear black from a distance, especially on a light-colored background.
Flea larvae have translucent, white-colored bodies. The primary food source of flea larvae is adult flea droppings. The so-called flea dirt is composed of partially digested host blood. Upon consuming the fecal blood, the larval digestive tract turns a dark red to purple color. The crimson-colored innards become clearly visible through the semi-transparent cuticle. As a result, the larvae appear much darker, and somewhat brown. From a distance, they may look black.