Tim Flannery's resume'describes him as a mammalogist and palaeontologist.
From the smh.com.au
This compares with 97 species of flowering plant for every botanist, and seven mammal species for every mammalogist.
From the newscientist.com
As a mammalogist, I've always been jealous of the ability of bird-watchers to casually go out and watch their creatures of interest.
From the scientistatwork.blogs.nytimes.com
The earliest of the new generation of field guides was prepared by Florence Merriam, sister of Clinton Hart Merriam, the mammalogist.
From the en.wikipedia.org
A California ornithologist and mammalogist, Author Orr describes the quirks and patterns of migration that scientists have brought to light, mostly during the past quarter-century.
From the time.com
According to a marine mammalogist for the Humane Society of the United States, wild killer whales live nearly twice as long on average as those in amusement parks.
From the latimes.com
More examples
One skilled in the study of mammals
(mammalogy) the branch of zoology that studies mammals