Rosa Barrios — Puerto Iguazú, Province of Misiones

Official source account — 2021 annual report, printed page 57: Rosa Barrios discovered two blurred objects when reviewing a photograph from Puerto Iguazú. CIAE found strong defocus consistent with a nearby subject, together with faint translucent wing-like borders. It proposed an insect crossing very close to the lens during exposure. The agency classified this as a supported Type B explanation and did not present the accidental photographic event as reproducible. The summaries distinguish reported observations from the agency’s proposed explanations. Source Type A/B ratings describe explanatory confidence and are not encounter classes.