This is the southern outflow from the bog in the hills above Ellenabeich; there is just a small puddle of stagnant water at the left of the image. The stream bed is dry and dusty; the grasses on the banks are drying out.
https://media.mastodon.scot/media_attachments/files/114/499/957/657/478/054/original/fd58841966b936c9.jpg