Thursday, 9 February 2017

Fish in the sky?

SkyfishThe bright white object near the centre of this photo (right) looks to me like a fish. It appears to have tail fins on its right end which would mean it is swimming left. The only problem is that the 'fish' is clearly several metres above the ground. So, what's going on?

Could it be a flying fish? No, because it is nowhere near the sea and flying fish are a family of marine species. Could it be a fish-shaped balloon? That's entirely possible but it isn't the case. Luckily, though the photo is affected by camera shake and the object is overexposed, it is possible to identify the 'fish' by zooming in. The white object is actually a bird - a gull in fact - seen flying sideways on. The 'tail fin' at the back is formed by one of the bird's wings. The other wing is barely visible because it mostly blends in with the trees in the background.

I spotted the 'fish' straight away when I was reviewing some photos I'd taken recently. I didn't see a fish-shaped object at the time of exposure, of course. That's because I'd have seen a flying gull. It only resembles a fish because the still photo froze a moment in time when the gull happened to resemble a fish shape. There are many anomalous photos produced in this way.

It was only possible to unambiguously identify this photographic anomaly because the photo had a reasonably high resolution. Had the photo been low resolution it might have remained a mystery or been interpreted as something anomalous. Many anomalous photos that I've examined are low resolution making it often impossible to say exactly what they show.

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