Scientists said the critically-endangered species had previously only been found in rivers and know pearl mussels have been discovered in the Scotland Lochs.
The pancakes form when foam floating on a river or the sea freeze. These frozen chunks are then shaped by being rubbed against one another in eddies of water.
Pink salmon are native to the Pacific Ocean. From stocking programs in Russia in the 1960s they have spread to Northern Europe, and in 2017 male and female pink salmon were spotted in the River Ness in the Highlands of Scotland. And now, two years later, camera images suggest that their spawn has returned.
The discovery in the Cairngorms is only the eighth time a cow wheat shieldbug has been recorded in Scotland.
'Unprecedented numbers' of pink salmon were seen in 2017 and the fish have been spotted again this year.
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