Place: 48.730990, 14.720005 (Hojna Voda - Kravi Hora)
Elevation: 970 m
Description: Marriage flight of Myrmica rubra ants at late summer above observation tower on Kravi hora hill. Mild iriscendent colors are visible on pillars which ants made against sun as rays are refracted by their bodies. On left side of picture are depicted two queens with wings.
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