Rocket nets and cannon nets are types of animal traps used to trap many live animals, usually birds, but they also have been used to catch large animals such as various species of deer. Rocket nets, cannon nets, and other net launching devices are built upon similar principles have been used since the 1950s (Dill and Thornsberry 1950, Hawkins et al. 1968, Grubb 1988 and 1991). Rocket and cannon nets are used in conservation programs where many live animals need to be captured for analysis, veterinary care or relocation.