an emerald drake

• -1788, -2510, 3 (2 of 3 spawns here)
• -1870, -178, 1 (seen once)
• -1636, 370, 89 (seen once) (1 of 2 spawns here)
• -1831, -300, 24 (seen once) (1 of 2 spawns here)
• -1522, -1767, 2 (seen once)
• -1492, -2207, 2 (seen once)
• -1614, -1093, -2 (seen once) (1 of 2 spawns here)
• -1570, -1868, 9 (seen once)
• -2557, -1670, 18 (seen once)
• -1493, -454, 1 (seen once) (1 of 6 spawns here)
• -1447, -2481, 10 (seen once) (1 of 2 spawns here)
• -1618, -195, 2 (seen once)
• -1766, -583, 1 (seen once)
• -813, -2495, 1 (seen once)
• -2096, -1641, 2 (seen once)
• 143, 332, 1 (seen once) (1 of 5 spawns here)
• -563, 438, -2 (seen once) (1 of 2 spawns here)
• -1082, 70, -3 (seen once) (1 of 3 spawns here)
• -1931, -2130, 2 (seen once)
• -156, -2041, 2 (seen once) (1 of 5 spawns here)
• -471, -2663, 27 (seen once) (1 of 2 spawns here)
• -1607, -983, -44 (seen once)
• -290, -11, 6 (seen once)
• -782, 343, 1 (seen once)
• -1483, -809, 21 (seen once) (1 of 2 spawns here)
• -1901, 45, 14 (seen once) (1 of 3 spawns here)
• -2385, -841, 1 (seen once)
• -1764, -1296, -35 (seen once) (1 of 2 spawns here)
• -2043, -1494, -9 (seen once) (1 of 4 spawns here)
• -921, 247, 6 (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.