(2002, July). Nicaraguan Border Crossing Imminent, The Gone Birding Newsletter 3(3). 


(2008). Operation Ruby-throat. 


(2008). Operation Rubythroat in Costa Rica, The Barred Owl, Newsletter of the Baton Rouge Audubon Society 35(4), 3. 


(2008, April 9). Costa Rica: A birder’s dream. 


(2012, November 18). Fascination with Place. [Web log post]. 


(2013, June). Sweet birding on sugar creek. [Web log post]. 


(2015). Wings Over the Rockies Costa Rica Trip with Eagle Eye Tours. 


Birdwatch News Archive. (2015, November 4). New Big Day record set in Costa Rica.


Field Guides. (2012). Holiday Costa Rica: Rancho Naturalista II 2012. 


(2015, November). Birds of a Feather. 


Lebbin, D. J., Pott, C., Leavelle, K., Jones, E., Gallo, A. & Powell, L. (2014). Yellow-billed Cotinga (Carpodectes antoniae), Neotropical Birds Online (T. S. Schulenberg, Editor). Ithaca: Cornell Lab of Ornithology.


O’Donnell, P. (2010, October 10). What Happened at Costa Rica’s First Birding and Biodiversity Festival. [Web log post]. 


O’Donnell, P. (2012). The Unspotted Saw-whet Owl becomes Spotted in Costa Rica. [Web log post]. 


O’Donnell, P. (2014, November 1). Getting lucky with a Ground-Dove in Costa Rica. [Web log post].


O’Donnell, P. (2015). Some October Birding News for Costa Rica. [Web log post]. 


Pickering, P.G. (2015, December 25). Birds for Beer. [Web log post]. 


Rynard, Su. (2015, March 30). The Secret to Filming Wild Birds in Big Cities & « Jungles ». [Web log post]. 


Segura, D. (Septiembre 2013). Aves de Cartago. [Web log post]. 


The Montgomery Herald. (2010, August 11). Costa Rican naturalist to take part in Hummingbird Festival. 


Weidensaul, S. (2015). Peterson Reference Guide to Owls of North America and the Caribbean. New York:Houghton Mifflin Harcourt.