The passenger pigeon, one of hundreds of species ofextinct birds, was hunted to extinction over the course of a few decades
Yes, humans are incredibly adept at killing and fighting, but can we not rise above all that?
According to a 1998 survey of 400 biologists conducted by New York's American Museum of Natural History, nearly 70% believed that the Earth is currently in the early stages of a human-caused mass extinction, known as the Holocene extinction. In that survey, the same proportion of respondents agreed with the prediction that up to 20% of all living populations could become extinct within 30 years (by 2028). Biologist E. O. Wilson estimated  in 2002 that if current rates of human destruction of the biosphere continue, one-half of all plant and animal species of life on earth will be extinct in 100 years. More significantly, the current rate of global species extinctions is estimated as 100 to 1000 times "background" rates (the average extinction rates in the evolutionary time scale of planet Earth), while future rates are likely 10,000 times higher. However, some groups are going extinct much faster.