This object was not observed in the field as it was found in image, once I returned from the trip. It was silent. The EXIF info shows focal length of lens as 17mm, which in bright daylight such as this should place everything from 2 feet to infinity in focus. Shutter speed was 1/250th of a second.There is no lens dirt on the prior or post photograph taken within minutes. Artifact is inconsistent with dust on the sensor. What can this be? Original RAW photo can be provided.

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