Ongoing changes in the avifauna of La Selva Biological Station, Costa Rica: Twenty-three years of Christmas Bird Counts. Boyle, W. A. & Sigel, B. J. Biological Conservation, 188:11--21, August, 2015.
Ongoing changes in the avifauna of La Selva Biological Station, Costa Rica: Twenty-three years of Christmas Bird Counts [link]Paper  doi  bibtex   
@article{boyle_ongoing_2015,
	title = {Ongoing changes in the avifauna of {La} {Selva} {Biological} {Station}, {Costa} {Rica}: {Twenty}-three years of {Christmas} {Bird} {Counts}},
	volume = {188},
	issn = {00063207},
	shorttitle = {Ongoing changes in the avifauna of {La} {Selva} {Biological} {Station}, {Costa} {Rica}},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0006320715000063},
	doi = {10.1016/j.biocon.2015.01.004},
	language = {en},
	urldate = {2016-10-08TZ},
	journal = {Biological Conservation},
	author = {Boyle, W. Alice and Sigel, Bryan J.},
	month = aug,
	year = {2015},
	pages = {11--21}
}

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