According to a report in 1942, the Soviet army discovered abandoned German trucks with pigeon cameras that could take photos in five-minute intervals, as well as dogs trained to carry pigeons in baskets.
Ifølge en rapport fra 1942 opdagede den sovjetiske hær forladte tyske lastbiler med duekameraer, der kunne tage fotos med fem minutters intervaller, samt hunde, der var trænet til at bære duerne i kurve.