Wild life on the Mere and fields of gold

It was a promising day to visit the Mere at Ellesmere one of the largest lakes of the nine glacial meres around the 'North Shropshire Lake District'. We only managed to see the Mere and Whitemere so at some time I should explore the others: Blakemere, Colemere, Crosemere, Hanmer Mere, Kettlemere, Newtonmere, and Sweatmere. Mere in English refers to a lake that is broad in relation to its depth, and it was a popular area to observe nesting herons but of course we were too late for that treat.  However, there was no shortage of other species of bird to contribute to the strong odour of  "Guano".   I did try to look up the species of goose with the large vent (a rear with a prolapsed appearance) but have not been able to source exactly what I saw. The nearest I could find was a "snow goose". An ornithologist opinion would be much appreciated.

On the way back I couldn't resist stopping to take a closer look at the harvest.