Aerial photos of Vadret da Morteratsch from similar positions in 1969 and 2021. In the older image, Vadret Pers flows from the left (true right) into Vadret da Morteratsch and forms a medial moraine with it. Since about 2015, the two glacier tongues are separated (image 1969: ETH-Bibliothek ZH, Bildarchiv, Comet Photo AG (Zurich), Com_F69-16375, CC BY-SA 4.0, image 2021: Alean).