a fungus spore

• 883, -476, -15 (seen once)
• 637, -406, -29 (seen once)
• 332, -635, -24 (seen once) (1 of 2 spawns here)
• 123, -349, -32 (seen once) (1 of 3 spawns here)
• -1698, -334, -32 (seen once)
• 1485, -333, -33 (seen once) (1 of 2 spawns here)
• 1018, 67, -24 (seen once)
• 936, -442, -28 (seen once) (1 of 2 spawns here)
• -76, -280, -25 (seen once) (1 of 2 spawns here)
• -691, -468, -28 (seen once)
• -1477, -443, -32 (seen once)
• 1659, -616, -19 (seen once) (1 of 2 spawns here)
• -1374, -208, -45 (seen once)
• 2102, -220, -28 (seen once) (1 of 2 spawns here)
• 77, -551, -32 (seen once)
• -907, -521, -16 (seen once) (1 of 2 spawns here)
• -1095, -268, -21 (seen once)
• -1727, -529, -32 (seen once)
• 1174, -386, -26 (seen once) (1 of 3 spawns here)
• 1880, 1060, -32 (seen once)
• 498, -360, -33 (seen once)
• 419, -350, -33 (seen once)
• 373, -350, -33 (seen once)
• -99, -509, -35 (seen once) (1 of 2 spawns here)
• -1200, -501, -32 (seen once)
• 1457, -363, -32 (seen once)
• 1003, -337, -18 (seen once) (1 of 2 spawns here)
• 1002, -532, -32 (seen once)
• -292, -348, -14 (seen once)
• -565, -492, -29 (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.