Walter Gilman
I've lost my previous note, so sorry for poor coordinate for my orange map marker:

'This site, the Laguna Anantay Valley,
was a west–east draining glacial valley, bisected by
a rushing stream, the flow of which was obstructed
by a moraine to form a 12 ha lake (14° 03’ 40” S;
73° 00’ 05” W; 4360 m elevation).'

There are few more coordinates making mapping the area, not just the lake possible, map with remarks done after fieldwork marking important features spotted on geoimages and altitude map.

https://www.int-res.com/articles/esr_oa/n013p145.pdf

Results of this study were published in 2011 and show how geoimagery helped with discovering new area of suitable habitat for a few birds connected with Polylepis forests.

Just 2 families were reported to live nearby the fieldwork camp.

There are plenty of really detailed info in bird studies and I wish I could have more energy to share it whenever I come across some