1999 National Audubon Society Wildlife Conservation Stamps ASWC15

1999 National Audubon Society Wildlife Conservation Stamp Sheet featuring Chimney Swift, Anna's Hummingbird, Rufous Hummingbird, Ruby-throated Hummingbird, and Loggerhead Shrike. Complete mint pane of five $2 conservation stamps forming a continuous wildlife scene, designed by Alexei Isakov. Fifteenth annual issue in the series.