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Appendix C: Random Monster Encounters	-	-	-	DMG

Plain

01-10	Anatosaurus
11-12	Ankylosaurus
13	Apatosaurus (If water body is nearby, otherwise roll again)
14	Brachiosaurus (If water body is nearby, otherwise roll again)
15	Camarasaurus
16	Cetiosaurus (If water body is nearby, otherwise roll again)
17	Diplodocus (If water body is nearby, otherwise roll again)
18-20	Gorgosaurus
21-40	Iguanadon/Lambeosaurus
41-42	Lizard, minotaur
43-46	Monoclonius
47-53	Miscellaneous Small-Medium Reptiles (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) <>
54-67	Pentaceratops
68-69	Pterodactyl, small (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) (75% likely to be encountered while airborne) <>
70-76	Pteranodon (75% likely to be encountered while airborne)
77-79	Styracosaurus
80-82	Teratosaurus
83-92	Triceratops +
93-00	Tyrannosaurus Rex

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Scrub

01-06	Anatosaurus
07-10	Ankylosaurus
11-12	Antrodemus
13	Apatosaurus (If water body is nearby, otherwise roll again)
14	Brachiosaurus (If water body is nearby, otherwise roll again)
15-17	Camarasaurus
18-22	Ceratosaurus
23	Cetiosaurus (If water body is nearby, otherwise roll again)
24	Diplodocus (If water body is nearby, otherwise roll again)
25-28	Gorgosaurus
29-35	Iguanadon/Lambeosaurus
36-41	Monoclonius
42-47	Miscellaneous Small-Medium Reptiles (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) <>
48-54	Pentaceratops
55-60	Plateosaurus
61-62	Pterodactyl, small (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) (75% likely to be encountered while airborne) <>
63-67	Pteranodon (75% likely to be encountered while airborne)
68-69	Snake, Giant, Constrictor
70-82	Stegosaurus
83-87	Styracosaurus
88-89	Teratosaurus
90-95	Triceratops, 2-8
96-00	Tyrannosaurus Rex

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Forest

01-08	Anatosaurus
0-14	Antrodemus
15-19	Apatosaurus (If water body is nearby, otherwise roll again)
20	Brachiosaurus (If water body is nearby, otherwise roll again)
21-23	Camarasaurus
24-28	Ceratosaurus
29	Cetiosaurus (If water body is nearby, otherwise roll again)
30	Diplodocus (If water body is nearby, otherwise roll again)
31-40	Iguanadon/Lambeosaurus
41-45	Lizard, giant
46-50	Megalosaurus
51-55	Miscellaneous Small-Medium Reptiles (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) <>
56-63	Paleoscincus
64-80	Plateosaurus
81-85	Snake, Giant, Constrictor
86-95	Stegosaurus
96-00	Teratosaurus

Marsh

 

01-12	Anatosaurus
13-18	Apatosaurus
19-23	Brachiosaurus
24-28	Camarasaurus
29-34	Cetiosaurus
35-40	Crocodile, giant
41-48	Diplodocus
49-56	Iguanadon/Lambeosaurus
57-60	Lizard, giant
61-63	Lizard, minotaur
64-65	Miscellaneous Small-Medium Reptiles (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) <>
66-71	Nothosaurus (** The nothosaurus is to be treated as a megalosaurus in all respects save habitat and movement, the latter being 6"//12"). <>
72-76	Paleoscincus
77-82	Pterodactyl, small (Basically small or inoffensive creatures which can not be immed. distinguished as such by onlookers.) (75% likely to be encountered while airborne) <>
83-89	Pteranodon (75% likely to be encountered while airborne)
90-00	Snake, Giant, Constrictor

The creatures listed above are not all from the same geological period, but
they provide a highly interesting mixture for adventuring. Feel free to
devise your own encounter matrix for Jurassic, Triassic, or other period
with non-aberrant creatures.