The ability to watch wildlife without disturbing them has absolutely been an amazing development for observation. Two cathedrals, one in Brussels, Belgium and one in Salisbury, England have inhabited families of peregrine falcons. Their nests are under the watchful eye of surveillance cameras for researchers to document the process of raising baby chicks. It's remarkable to see how over time the chicks get bigger, lose their white feathers, and gain more mobility and independence. Thanks to the Royal Belgian Institute of Natural Sciences for the video.