1. American birds: Audubon was not the first
Charles Walcott 
Current Biology 
Volume 23, Issue 10, Pages R426-R427 (May 2013)
DOI: /j.cub
Copyright © 2013 Elsevier Ltd Terms and Conditions

2. Current Biology 2013 23, R426-R427DOI: (10.1016/j.cub.2013.03.019)
Copyright © 2013 Elsevier Ltd Terms and Conditions

3. Great heron. From the archives of the Museum of Comparative Zoology, Ernst Mayr Library, Harvard University.
Current Biology  , R426-R427DOI: ( /j.cub )
Copyright © 2013 Elsevier Ltd Terms and Conditions