Dictyocaulus viviparus is a species of nematodes belonging to the family Dictyocaulidae.

[1] It is parasitic, and has the common name of the bovine lungworm due to its negative impact on cattle.

[2] Dictyocaulus viviparus is ovi-viviparous and gives birth to eggs which are coughed up and eaten.

These eggs hatch in the digestive tract and are then excreted live.

[3] When eaten, the larvae chew through the intestinal wall to the mesenteric lymph nodes.