Show Migratory Bird Flyways J Ducks and other wild fowl travel tram from north to south and then bl ball back again as ns seasons change over fo four fM u favored routes which are 1 AIo Along Aloni z the Atlantic seaboard 2 down th the th Mississippi valley 3 from Canada Canad to Montana and then directly south or southeast Into the Gulf Gull of Me-dM Me area 4 the Pacific slope Only explanation tion for tor the migrations d d' fi some birds is heredity Most afe re born in the North and many breeds breedi date back to the Pleistocene age agel i 1 |