Data dictionary:
* Group												Order of mammals
* Genus species										Latin binomial name
* brain mass										Brain mass (in grams)
* Ref. brain mass									Reference for brain mass
* body mass											Body mass in grams
* Ref. body mass									Reference for body mass
* hibernation										Whether the species hibernates (0 = no, 1 = yes)
* Ref. hibernation									Reference for hibernation
* diurnality										Whether the species is diurnal  (0 = no, 1 = yes)
* Ref. diurnality									Reference for diurnality
* substrate use										Type of substrate used by the species (1 = semi-aquatic, 2 = fossorial or semi-fossorial, 3 = terrestrial or semi-arboreal, 4 = arboreal, 5 = volant)
* Ref. substrate use								Reference for substrate use
* diet												Type of diet (1 = herbivore or folivore, 2 = frugivore/folivore or granivore, 3 = frugivore/faunivore or omnivore, 4 = faunivore, piscivore, carnivore or insectivore)
* Ref. diet											Reference for diet type
* mid-latitude of geographical distribution			Mid-latitude of species distribution (in decimal degrees)
* Ref. mid-latitude of geographical distribution	Reference for distribution

NOTE: the data columns contain commas and apostrophes.  This may cause problems if you try to export to CSV or import to R.

Data reference:
Heldstab SA, Isler K, van Schaik CP (2018) Hibernation constrains brain size evolution in mammals. Journal of Evolutionary Biology, online in advance of print. https://doi.org/10.1111/jeb.13353
