Through Nigel's adventures, some of his finds have been named.
T-Rex - Terence and Matilda
Mammoth - Martha
Triceratops - Theo
Smilodon - Sabrina
The rest of the animals at Prehistoric Park aren't named.
Episode 1 - Nigel aims to recover a T-rex, but ends up first with a Triceratops, them some Ornithomimus, and finally two T-rex
Epsiode 2 - Nigel aims to bring back a mammoth, but first gets an Woolly Rhino, then a Woolly Mammoth
Episode 3 - Nigel brings pack a herd of Titanosaurs and some Microraptor.
Episode 4 - Nigel aims to and successfully does recover a pair of sabre-toothed tigers
Episode 5 - Nigel brings back three types of massive insect - Arthropleura, Meganuera and a giant scorpion
Episode 6 - Nigel aims to recover a Deinosuchus, which he successfully does. He also accidentally brings back a Troodon. At the end of this epsiode, Matilda, one of the T-rex, is let loose when a Titanosaur breaks down her enclosure fence.