This is a list of the deadliest animals to
humans worldwide, measured by the number of humans killed per year. Different lists have varying criteria and definitions, so lists from different sources disagree and can be contentious. This article contains a compilation of lists from several reliable sources.
^Mosquitoes do not kill humans directly. Rather, they are a vector that transmits
Mosquito-borne diseases.
^Humans are also a vector for Human-borne diseases. Deaths from these are not included here. Homicides include also terroristic attacks and war casualties, while car accidents are excluded.
^Dogs seldom kill humans directly. Rather, they are primarily a vector that transmits
rabies.
^Tsetse flies do not kill humans directly. Rather, they are a vector that transmits
sleeping sickness.
^Assassin bugs do not kill humans directly. Rather, they are a vector that transmits
Chagas disease.
^Freshwater snails do not kill humans directly. Rather, they are a vector that transmits a variety of
tropical diseases.