Been a few years since I've updated this but was thinking about this thread while I was in Ethiopia/Djibouti recently with some of the special rarities we saw. When I first posted on this thread in 2018 people had fun seeing how many of my list they had seen- I challenge anyone interested to do the same here!
1. Forest Elephant
2. Barbary ground squirrel
3. West Sahara Hare
4. Tarabul’s Gerbil
5. Egyptian Free-tailed Bat
6. Egyptian Mouse-tailed Bat
7. Greater Horseshoe Bat
8. Gray Long-eared Bat
9. Granada Hare
10. Azores Noctule
11. Striped Dolphin
12. Peters Epauletted Fruit Bat
13. Black Colobus
14. Green Bush Squirrel
15. Gabon Squirrel Galago
16. Beecroft Anomalure
17. Hairy Slit-faced Bat
18. Bolivian Squirrel
19. Rio Beni Titi
20. Bolivian Red Howler
21. Bolivian Boutu
22. Brown Agouti
23. Southern Amazon Red Squirrel
24. Short-tailed Spiny Rat
25. Olallae Titi
26. Common Four-eyed Opossum
27. Madidi Titi
28. Elegant Rice Rat
29. Simons’s Spiny Rat
30. Shock-headed Capuchin
31. Bicolor Porcupine
32. Brown Four-eyed Opossum
33. Valparaiso Myotis
34. Darwin's Leaf-eared Mouse
35. Bennett’s Chinchilla Rat
36. Long-tailed Pygmy Rice Rat
37. Southern Big-eared Brown Bat
38. Chilean Myotis
39. Darwin’s Fox
40. Hairy Soft-haired Mouse
41. Southern River Otter
42. Southern Huemul
43. Central Chilean Colocolo
44. Elegant Fat-tailed Mouse Opossum
45. Seven-banded Armadillo
46. Small Vesper Mouse
47. South American hoary bat
48. Argentine Brown Bat
49. Talas Tuco-tuco
50. Franciscana
51. Red Hocicudo
52. Dune’s Tuco-tuco
53. Brazilian Marsh Rat
54. Southern Mountain Cavy
55. Lowland Yellow-toothed Cavy
56. Pichi
57. Drylands Vesper Mouse
58. Lowland Gerbil Mouse
59. Harare Dik-dik
60. Speke’s Pectinator
61. Somalian Gerbil
62. Silver Dik-dik
63. Dibatag
64. Ammodile
65. Somali Grass Rat
66. Mullah Spiny Mouse
67. Beira
68. Louise’s Spiny Mouse
69. Egyptian Tomb Bat
70. Ethiopian Genet
71. Maned Rat
72. Somali Sengi
73. Somali Klipspringer
74. Karoo Bush Rat
75. Namaqua Rock Rat
76. Cape Gerbil
77. Cape rock sengi
78. Cape Golden Mole
79. Cape Mole-rat
80. Natal Long-fingered Bat
81. West-Central South African Four-striped Grass Rat
82. Cape short-eared Gerbil
83. Highveld Gerbil
84. Eastern Rock Sengi
85. Tsessebe
86. Hairy-footed Gerbil
87. Long-tailed Serotine
88. Brant’s Whistling Rat
89. Western rock sengi
90. Crater’s of the Moon Chipmunk
91. Montane Vole
92. Columbian Ground Squirrel
93. Piute Ground Squirrel
94. Townsend’s Pocket Gopher
95. Southern Idaho Ground Squirrel
96. Townsend’s Ground Squirrel
97. Washington ground squirrel
98. Raffles’ Banded Langur
99. Slender Squirrel
100. Indomalayan Lesser Bamboo Bat
101. Malayan Greater Bamboo Bat
102. Cave Nectar Bat
103. Black-striped Squirrel
104. Javan Tree Shrew
105. West Javan Langur
106. Arrow Flying Squirrel
107. Lesser False vampire bat
108. White-thighed Langur
109. Grey-bellied Squirrel
110. Black-bearded Tomb Bat
111. Annandale’s Sundaic Rat
112. Malayan Woolly Horseshoe Bat
113. Gray Tree Rat
114. White-beaked Dolphin
115. Groves Dwarf Lemur
116. Rufous Mouse Lemur
117. Pale Shrew Tenrec
118. Eastern Red Forest Rat
119. Golden Bamboo Lemur
120. Peyrieras's woolly lemur
121. Milne-Edwards’ Sifaka
122. Webb’s Tufted-tailed Rat
123. Lesser Tufted-tailed Rat
124. Small-toothed Sportive Lemur
125. Sibree’s Dwarf Lemur
126. Tanala Tufted-tailed Rat
127. Eastern Sucker-footed Bat
128. Peter’s Sheath-tailed Bat
129. Jolly’s Mouse Lemur
130. Major’s Long-fingered Bat
131. Dobson’s Shrew Tenrec
132. Verreaux’s Sifaka
133. Pale Fork-marked Lemur
134. Red-tailed Sportive Lemur
135. Madame Berthe’s Mouse Lemur
136. Petter’s Mouse Lemur
137. Bemaraha Sportive Lemur
138. Von Deckens Sifaka
139. Madagascar Long-fingered Bat
140. Malagasy Mouse-eared Bat
141. Madagascar Giant Mastiff Bat
142. Western Nesomys
143. Bastard’s Big-footed Mouse
144. Racey’s Pipistrelle
145. Kirindy Serotine
146. Malagasy White-bellied Free-tailed Bat
147. Diademed Sifaka
148. Indri
149. Eastern Woolly Lemur
150. Crossley’s Dwarf Lemur
151. Madagascar Rousette
152. Major’s Tufted-tail Rat
153. Weasel Sportive Lemur
154. Malagasy Eastern Free-tailed Bat
155. Peters's Goblin Bat
156. Greater Dwarf Lemur
157. Seals Sportive Lemur
158. MacArthur's Mouse Lemur
159. Masoala Woolly Lemur
160. Masoala Sportive Lemur
161. Commerson’s Leaf-nosed Bat
162. Lowland Red Forest Rat
163. Mittermeier’s Mouse Lemur
164. Silky Sifaka
165. Golden-crowned Sifaka
166. Daraina Sportive Lemur
167. Tavaratra Mouse Lemur
168. Perrier’s Sifaka
169. Ankarana Sportive Lemur
170. Aellen’s Long-fingered Bat
171. Griveaud’s Long-fingered Bat
172. Amber Mountain Dwarf Lemur
173. Amber Mountain Fork-marked Lemur
174. Amber Mountain Mouse Lemur
175. Ankarana Dwarf Lemur
176. Madagascar Fruit Bat
177. Rock-dwelling Sheath-tailed Bat
178. Sambirano Fork-marked Lemur
179. Gray-backed Sportive Lemur
180. Nosy Be Sportive Lemur
181. Nosy Be Mouse Lemur
182. Danfoss Mouse Lemur
183. Golden Brown Mouse Lemur
184. Milne-Edwards’ Sportive Lemur
185. Western Tufted-tail Rat
186. Western Woolly Lemur
187. Mahafaly Long-fingered Bat
188. Rufous Trident Bat
189. Gray-brown Mouse Lemur
190. Petter’s Sportive Lemur
191. White-footed Sportive Lemur
192. Southern Woolly Lemur
193. Thomas’ Dwarf Lemur
194. Anosy Mouse Lemur
195. Big-eared climbing Rat
196. Northern Hairy-legged myotis
197. Dobson’s Lesser Mustached Bat
198. Thomas’s Naked-backed Bat
199. Ghost-faced Bat
200. Cozumel Golden Bat
201. Mexican Funnel-eared Bat
202. Yucatan Little Yellow Bat
203. Yucutan harvest mouse
204. Yucatan Cottontail
205. Woolly false vampire bat
206. Short-eared Bat
207. Chestnut Sac-winged Bat
208. Thomas’s Shaggy Bat
209, Striped Yellow-eared Bat
210. Pygmy Round-eared Bat
211. Thumbless Bats
212. Commissaris's long-tongued bat
213. Talamancan Deer Mouse
214. Short-nosed Harvest Mouse
215. Riparian Myotis
216. Underwood’s Long-tongued Bat
217. Vesper Rat
218. Gray Sac-winged Bat
219. Northern Ghost Bat
220. Central American Silky Anteater
221. Short-tailed Cane Rat
222. Dark Four-eyed Opossum
223. Costa Rican Pygmy Rice Rat
224. Orange Nectar Bat
225. Mesoamerican Mustached Bat
226. Big Naked-backed Bat
227. Spix’s Disc-winged Bat
228. Pygmy Fruit-eating Bat
229, Northern Yellow-shouldered Bat
230. Tomes’ Spiny Rat
231. Goldman’s Nectar Bat
232. Peter’s Disc-winged Bat
233. Northern Yellow Bat
234. Chiriqui Harvest Mouse
235. Montane Rice Rat
236. Indonalayan maxomys
237. Arboreal niviventer
238. Malayan Wood Rat
239. Minute Fruit Bat
240. Pencil-tailed tree Mouse
241. Dagger-toothed fruit bat
242. Indonesian Fruit Bat
243. Greater woolly horseshoe bat
244. Giant Tree Rat
245. Lesser Sheath-tailed Bat
246. Geoffroy's rousette
247. Sorensen’s Leaf-nosed Bat
248. Dusky Leaf-nosed Bat
249. Bicolored Leaf-nosed Bat
250. Diademed Leaf-nosed Bat
251. Short-tailed Gymnure
252. Halimun Roundleaf Bat
253. Three striped ground squirrel
254. Long-eared Chipmunk
255. Belding’s ground squirrel
256. Lodgepole Chipmunk
257. Alpine Chipmunk
258. Panamint Chipmunk
259. Western Deer Mouse
260. Fringed Myotis
261. Long-eared Myotis
262. Western Small-footed Myotis
263. Townsend’s Big-eared Bat
264. Western Mastiff Bat
265. Heermann’s Kangaroo Rat
266. White-tailed Antelope Squirrel
267. San Joaquin antelope squirrel
268. Dulzura Kangaroo Rat
269. Pacific Pocket Mouse
270. Yuma Myotis
271. California Myotis
272. Kuhl’s Pipistrelle
273. Greater Mouse-tailed Bat
274. Middle East blind mole-rat
275. Southern White-breasted Hedgehog
276. Mountain Gazelle
277. Acacia Gazelle
278. Hairy-nosed Otter
279. Horse-tailed Squirrel
280. Raffray's Bandicoot
281. Otter Civet
282. Sunda Clouded Leopard
283. Philippine Slow Loris
284. Dian's Tarsier
285. Indonesian Mountain Weasel
286. Black Spotted Cuscus
287. Feather-tailed Possum
288. Moluccan Masked Flying Fox
289. Blue-eyed Cuscus
290. Waigeou Cuscus
291. Gorontolo Macaque
292. Natuna Island Surili
293. Siau Island Tarsier
294. Borneo White-bearded Gibbon
Three, I think