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Extensive ovipositor movements, AFAIK, can be see after emergence, after mating and after oviposition. The first can be excluded as the specimen is rather tattered. Considering the date, perhaps an overwintering specimen that just woke up and is doing some muscle stretching or a specimen that just did some ovipositing but certainly not where you photographed it. Eggs will be deposited near water or very wet locations as the larvae are aquatic.