a giant widow

• -1009, -830, -73 (seen once) (1 of 2 spawns here)
• -605, -567, -43 (seen once) (1 of 2 spawns here)
• -1370, -410, -1 (seen once) (1 of 2 spawns here)
• -490, -543, -45 (seen once) (1 of 2 spawns here)
• -2038, -292, -55 (seen once) (1 of 6 spawns here)
• -1606, -599, -41 (seen once) (1 of 2 spawns here)
• -1690, -110, -56 (seen once) (1 of 2 spawns here)
• -1517, 154, -32 (seen once) (1 of 3 spawns here)
• -1786, 785, -26 (seen once)
• -2118, 823, -61 (seen once) (1 of 3 spawns here)
• -1245, -302, -41 (seen once)
• -1289, -363, -38 (seen once)
• -1107, -285, -59 (seen once) (1 of 4 spawns here)
• -1334, 168, -43 (seen once)
• -1386, -982, -33 (seen once) (1 of 2 spawns here)
• -1829, -673, -21 (seen once)
• -1641, 47, -34 (seen once) (1 of 2 spawns here)
• -1510, -257, -31 (seen once)
• -1334, 473, -38 (seen once)
• -1846, 247, -63 (seen once) (1 of 3 spawns here)
• -1011, -55, -56 (seen once) (1 of 2 spawns here)
• -1767, 720, -63 (seen once) (1 of 2 spawns here)
• -1634, -241, -48 (seen once) (1 of 3 spawns here)
• 0, 0, -2012 (seen once) (1 of 42 spawns here)

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.