biodiversity4all.org Rank 673.9K. Estimated value 3,204$whatbird.com Rank 1.2M. Estimated value 1,812$forestwildlife.org Rank 1.4M. Estimated value 1,560$audubon.org Rank 61.9K. Estimated value 35,532$whatbirdsareinmybackyard.com Rank 632.4K. Estimated value 3,420$carnivora.net Rank 2.2M. Estimated value 996$bto.org Rank 266.3K. Estimated value 8,172$worldbirds.org Rank 158.1K. Estimated value 13,812$sialis.org Rank 2.1M. Estimated value 1,020$allaboutbirds.org Rank 45.7K. Estimated value 48,240$