
A child observes birds through telescope at the "Antonis Tritsis" Environmental Education & Sensitization Park in the northern suburb of Athens, Greece, on Oct. 15, 2017. To celebrate the autumn migration of birds, people of all ages attended a festival of bird watching here on Sunday. The event was organized by the Hellenic Ornithological Society in an attempt to raise awareness for this special natural phenomenon, as part of the European Bird Watching Day. (Xinhua/Marios Lolos)














