Response to comment on "Evidence of prehistoric human activity in the Falkland Islands".

Hamley et al . previously presented multiple lines of evidence that people were present in the Falkland Islands before Europeans and may have brought the now-extinct canid, Dusicyon australis . Stable isotope data reported by Clark et al . indicate that D. australis had a high-trophic, marine diet that terrestrialized following European arrival. This is consistent with our hypothesis of a human mutualism.