From publisher blurb:
The Animal Archives series takes real world animal from past and presents them with full stats, an accurate illustration, notes on combat and tactics, useful information for players, and even a bit about the animal in the real world. The first product in the series, Prehistoric Animals I, highlights prehistoric animals found primarily in North America.
Animal Archives: Prehistoric Animals I contains 23 pages of OGL material, which includes:
Aepycamelus – the giant camel of the Miocene.
Amebelodon – the shovel-tusked relative of the elephant from the Miocene and Pliocene.
Hollowtusk – a skeletal amebelodon that guards an ancient bone bed.
Arctodus – the giant short-faced bear of the Pleistocene.
Primordial Guardian – an advanced celestial arctodus tasked with guarding the forests of the upper planes.
Brontotherium – the massive rhino-like herbivore from the Eocene.
Thunderhorn – A massive elder brontotherium protecting a huge swath of primeval forest.
Dinohyus – the infamous “terrible pig” of the Miocene.
Dunkleosteus – the gigantic armored fish of the Devonian.
Abyssal Leviathan - a massive demon-tainted dunkleosteus that is the undisputed master of the Abyssal seas.
Hyaenodon – the powerful wolf-like predators of the Paleocene and Oligocene.
Old Gnawfang – an awakened hyaenodon with an evil disposition and a hunger for the flesh of sentient creatures.
Presbyornis – an early waterfowl from the Eocene.
Ptilodus – a tiny squirrel-like animal from the Paleocene.
Also included:
Expanded information for players, including information on animal companions, familiars, and mounts.
A summon nature’s ally and summon monster appendix, complete with stat blocks for fiendish and celestial versions of many animals.
Real world information on each animal.