Cardinality of a Set from a 3 set venn Diagram

In our Video of the Week, sound recordist Greg Budney talks about the brilliant song of the Northern Cardinal. Both male and female cardinals sing, and they are some of the first birds to start singing in the year, bringing a blaze of color and sound to the gray days of late winter and early spring. | Cornell Lab of Ornithology

A beautiful male Northern Cardinal singing his heart out and I try not to miss a chance to capture them singing. . #birding #springwildlife #northerncardinal #cardinal #birds #bird #songbirds #naturelovers #birdsoffb #wildlifevideos #naturevideos #wildlife #birdlife #birdwatching #wildlifephotography #naturephotography | thewildlifecompanion

Northern cardinal singing (Cardinalis cardinalis) Maine, Minnesota, Texas, New Mexico, Arizona, California, Mexico, Belize, Guatemala. | BIRDS & Nature