Suggested citation and version history for McGrath, Laura J., and van Riper, Charles, III, 2005, Influence of riparian tree phenology on lower Colorado River spring-migrating birds; implications of flower cueing: U.S. Geological Survey Open File Report 2005-1140, 35 p. [http://pubs.usgs.gov/of/2005/1140/]. Version 1.0 September 19, 2007 Updated interface and migrated to http://pubs.usgs.gov/of/2005/1140/ 2005 Initial release online on the SWBC server http://sbsc.wr.usgs.gov/files/pdfs/ofr_2005-1140.pdf