1.12 Type of mob ID in play_server_spawn_entity_living packet / PacketPlayOutSpawnEntityLiving / SPAWN_ENTITY_LIVING (0x03)

4 elder_guardian
5 wither_skeleton
6 stray
23 husk
27 zombie_villager
28 skeleton_horse
29 zombie_horse
30 armor_stand
31 donkey
32 mule
34 evocation_illager
35 vex
36 vindication_illager
37 illusion_illager
50 creeper
51 skeleton
52 spider
53 giant
54 zombie
55 slime
56 ghast
57 zombie_pigman
58 enderman
59 cave_spider
60 silverfish
61 blaze
62 magma_cube
63 ender_dragon
64 wither
65 bat
66 witch
67 endermite
68 guardian
69 shulker
90 pig
91 sheep
92 cow
93 chicken
94 squid
95 wolf
96 mooshroom
97 snowman
98 ocelot
99 villager_golem
100 horse
101 rabbit
102 polar_bear
103 llama
105 parrot
120 villager