dr. benjamin vandorn and his colleagues studying these books slaughter these birds come to us because they have collided with windows or buildings. so one of these pieces is a black sort of blue warbler here, which is a song bird migrant. this is the fate for pending. and so, but it's across not only north america, but the wells with the use of new technology from the kona lab as on the solid you in new york state, there is hope that we can make a difference to adrian. dr. is part of this team, migratory birds, they try to look nice and, and it's actually in ways of very hidden phenomena if there is cause we try to sort of make these migratory to your nissan parts come to life and use mostly radars for that. these weather radars are a 155 dose it across the us and mostly used for detecting rain. but the scientists here at cornell found a way to use them for detecting but the weather writers. they can't really see individual graphs as maybe like rain clouds right for, and you also don't see the individual droplets what you see. so if this density of mass over rain for the air is the sa