The large entelodont is named as Megachoerus, but that is now recognised as an obsolete scientific name rather then the valid Archaeotherium.
The entelodont is oversized, being reminiscent of the large Daeodon.
Titanis is portrayed as having long and slender legs like an ostrich's, when it should have more short and thick ones.
Entelodonts are mentioned as being related to pigs. This is inaccurate: they're actually very basal ungulates more related to hippos and whales. (Spaulding et al. 2009)
Megalania is mispronounced with a hard a sound rather then a soft a in most pronunciations.
Titanis is mentioned as living 1.5 million years ago in the Calabrian stage of the Pleistocene epoch, when most evidence so far points to it going extinct 1.8 million years in the Gelasian stage.