a shadow wolf

• 0, 0, 7987 (seen once) (3 of 58 spawns here)
• 0, 0, 7959 (seen once) (2 of 56 spawns here)
• 0, 0, 8032 (seen once) (2 of 33 spawns here)
• 0, 0, 6244 (seen once) (2 of 16 spawns here)
• 1264, 997, -48 (seen once) (2 of 6 spawns here)
• -1788, 1305, 16 (seen once)
• 700, 292, 15 (seen once) (2 of 4 spawns here)
• 0, 0, -10980 (seen once) (2 of 24 spawns here)
• 0, 0, 6168 (seen once) (3 of 23 spawns here)
• -1932, -501, -7 (seen once)
• -1647, -466, -15 (seen once)
• -1900, 485, 36 (seen once)
• -1768, 676, 57 (seen once) (1 of 2 spawns here)
• -1821, 815, 82 (seen once) (1 of 3 spawns here)
• 426, 427, 0 (seen once) (1 of 2 spawns here)
• -1994, -870, -6 (seen once)
• -1780, -986, 58 (seen once)
• -1806, -136, -4 (seen once) (1 of 2 spawns here)
• -2066, 617, -16 (seen once)
• -2135, 895, 3 (seen once) (1 of 2 spawns here)
• 354, 501, -8 (seen once) (1 of 5 spawns here)
• -1943, 1083, 5 (seen once) (1 of 3 spawns here)
• -1954, -973, 6 (seen once)
• -1834, -979, 15 (seen once)
• -1617, 930, 85 (seen once) (1 of 3 spawns here)
• -1951, 435, -4 (seen once)
• -1851, -723, -45 (seen once) (1 of 3 spawns here)
• 411, 1017, 79 (seen once) (1 of 3 spawns here)
• 1610, 282, -4 (seen once) (1 of 3 spawns here)
• -1182, 449, -1 (seen once)

As /loc gives them: Y, X, Z, the most used first; nearby spawns share a spot, and one seen in a single visit may be where the mob had been pulled to.