Need something to get you through Monday? Here’s a pic of an adorable clutch of baby peregrine falcons on banding day at Cabrillo National Monument in California. At birth, peregrine chicks weigh about 1.5 ounces, but they grow quickly – they can double their weight in just six days. They reach nearly full size after only seven weeks. Cool fact about peregrine falcons: They are among the fastest birds, flying at up to 55 mph and diving at more than 200 mph when striking avian prey in mid-air. Photo by National Park Service.