Cerling et al. reply — Köhler et al. suggest that phenomena other than floral change may be involved in the late Miocene global vegetation change, such as monsoonal dynamics or unnamed "other factors". Citing evidence from Spain and Pakistan, they do not believe that there is necessarily a synchronicity or a causal link between faunal and vegetation change in the late Miocene epoch. However, on the contrary, it seems highly unlikely that a vegetation change on the scale documented¹ would be uncorrelated with faunal change.

1. Department of Geology, University of Utah, Salt Lake City, Utah 84112, USA
2. Page Museum, Los Angeles, California 90036, USA
3. Florida Museum of Natural History, Gainesville, Florida 32611, USA
4. University of Arizona, Tucson, Arizona 85721, USA
5. National Museums of Kenya, Nairobi, Kenya
6. Museé National dHistoire Naturelle, 75005 Paris, France
7. Department of Biology, University of Utah, Salt Lake City, Utah 84112, USA