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Online Publications


Evans W. R. and O’Brien M. 2002. Flight Calls of Migratory Birds Eastern North American Landbirds. Old Bird Inc. [CD-ROM]. [Online]


Evans, W. R., Grosselet M., and Michael, G. Ruiz. 2017. An unidentified nocturnal flight call from southern Mexico. Huitzal 18(1):131-140.  http://www.scielo.org.mx/scielo.php?pid=S1870 74592017000100131&script=sci_arttext&tlng=pt

Manuscript (PDF 2.25 mb) Supplemental material (4 mb Zip file).

Evans, W. R. 2018. Avian nocturnal flight call study, Niagara & Orleans County NY, Towns of Somerset & Yates. Technical Report. Old Bird Inc. [Online]


Evans, W. R. 2021. Monitoring avian nocturnal flight calls: A treasure hunt for understanding bird migration in Arizona. Arizona Birds Vol. 2021.


(PDF 4.5 mb)


Evans, W. R. and Conway, M. H. 2021. Early fall migrant Black-and-white Warblers Mniotilta varia in the Lower Rio Grande Valley detected by nocturnal flight calls. Bulletin of the Texas Ornithological Society Vol. 54(1-2):19-25. https://texasbirds.org/publications.php         Manuscript (PDF 0.3 mb)


Evans, W. R. 2022. Presumed nocturnal flight call of the Green-tailed Towhee. Western Birds Vol. 53(2):143-152. https://westernfieldornithologists.org/publications/journal/journal-volume-53-2/