American Avocet (Recurvirostra americana) Conservation Status Review
Review Date = 09/15/2008
ScoreU - Unknown
ScoreG - 200,000-2,500,000 km squared (about 80,000-1,000,000 square miles)
Comment380530 square kilometers based on Natural Heritage Program range maps
Area of Occupancy
ScoreF - 500-2,000 km squared (about 125,000-500,000 acres)
Comment812 square kilometers based on GAP predicted model.
ScoreE - Relatively Stable (±25% change)
CommentPlaya lakes for breeding probably haven't been impacted more than 25%.
ScoreE - Stable. Population, range, area occupied, and/or number or condition of occurrences unchanged or remaining within ±10% fluctuation
CommentData limited, but BBS data 1966-2007 trend is 4.1% per year; BBS 1980-2007 trend is 2.9% per year
ScoreF - Widespread, low-severity threat. Threat is of low severity but affects (or would affect) most or a significant portion of the population or area.
CommentPlaya lake and wetland loss and alteration, Climate Change accerating drying of wetlands, contaminants
SeverityLow - Low but nontrivial reduction of species population or reversible degradation or reduction of habitat in area affected, with recovery expected in 10-50 years.
CommentWetlands are continually being altered at a slow rate
ScopeModerate - 20-60% of total population or area affected
CommentHigh number of wetlands are now altered.
ImmediacyHigh - Threat is operational (happening now) or imminent (within a year).
CommentOngoing and climate change could increase threat
ScoreC - Not Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance; or species has high dispersal capability such that extirpated populations soon become reestablished through natural recolonization (unaided by humans).
ScoreB - Narrow. Specialist. Specific habitat(s) or other abiotic and/or biotic factors (see above) are used or required by the Element, but these key requirements are common and within the generalized range of the species within the area of interest.
CommentRequire playa Lakes for breeding