Pablo Muhlberger — Mercedes; Province of Buenos Aires

Official source account — 2022 annual report, printed page 13: While filming the Moon at Mercedes, Pablo Muhlberger recorded filament-like forms crossing its disc from right to left. CIAE compared their shared features and consistent drift with airborne spider silk. Historical weather showed only a light variable breeze, so a precise wind-direction check was unavailable. The agency nevertheless considered wind-carried webs the supported explanation and classified the case Type B. The summaries distinguish reported observations from the agency’s proposed explanations. Source Type A/B ratings describe explanatory confidence and are not encounter classes. The map uses an approximate GeoNames locality centroid, not the observation point.