Costa Rica Endemic Birds (n.d.). In Living National Treasures . Retrieved March 12, 2015.
http://lntreasures.com/crb.html
Cuckoo (n.d.). In Wikipedia . Retrieved March 12, 2015.
http://en.wikipedia.org/wiki/Cuckoo
Cocos Island Cuckoo (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/speciesfactsheet.php?id=1307
Mangrove Hummingbird (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/species/factsheet/22687562
Coppery-headed Emerald (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/species/factsheet/22687646
http://lntreasures.com/crb.html
Cuckoo (n.d.). In Wikipedia . Retrieved March 12, 2015.
http://en.wikipedia.org/wiki/Cuckoo
Cocos Island Cuckoo (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/speciesfactsheet.php?id=1307
Mangrove Hummingbird (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/species/factsheet/22687562
Coppery-headed Emerald (n.d.). In Bird Life International . Retrieved March 12, 2015, from http://www.birdlife.org/datazone/species/factsheet/22687646