It turns out that the photo, taken somewhere in the forests of Nagano Perfecture shows a fellow scientist who decided to wear the disguise for an entire year in order to try and get close to the nest of birds. He didn't want to trigger any distress calls. Well, ornithologists and bird behavior experts have noticed that certain bird species were capable of remembering human faces and that they would start their usual chirping out to warn and to make calls whenever they saw individuals approaching