On a foggy day in november winged shadows landing in a valley near the Lake Junin (Peru). They are male Ascialophoraptor, the first of a few hundret, which come every year at this place.
It's the begin of the mating season and the males search for the nest they had last year or for a better one. These nests, which can be 1,7 meters high are used over generations and every year the males enlarge them to attract the attention of the females which come one or two weeks later. During this time the characteristic yellow spots at the throat of the dragons appear.