California State Roadkill

Roadkill occurs when vehicles collide with or run over wildlife, such as birds, mammals, reptiles, and amphibians. According to the Humane Society of the United States, over a million animals are killed every day on our roads and highways. We have created this site to provide a way for people like you to report roadkill so that we can understand and try to influence the factors that contribute to roadkill.

"This [roadkill] is a relatively new source of fatality; and if one were to estimate the entire mileage of such roads in the state, the mortality must mount into the hundreds and perhaps thousands every 24 hours." (Grinnell, 1920)

UC Davis
Road Ecology Center

A good example of large mortality at a single site is the following:

https://www.inaturalist.org/projects/pacific-newts-dead-lexington-reservoir-area menos ↑