Western Sandpiper population structure and prey and raptor abundance with respect to habitat type in Bahía Santa María, northwestern Mexico, during the nonbreeding seasons of 1999–2001. Least-squares means (±95% CI) are reported, controlling for annual variation, and sample sizes are given in parentheses. Sample size for bird density = number of observation plots surveyed, for sex and age composition = number of birds, for prey density = number of sediment cores, and for raptor encounter rate = number of survey hours
Western Sandpiper population structure and prey and raptor abundance with respect to habitat type in Bahía Santa María, northwestern Mexico, during the nonbreeding seasons of 1999–2001. Least-squares means (±95% CI) are reported, controlling for annual variation, and sample sizes are given in parentheses. Sample size for bird density = number of observation plots surveyed, for sex and age composition = number of birds, for prey density = number of sediment cores, and for raptor encounter rate = number of survey hours
