Hammond's Flycatcher (Empidonax hammondii) Conservation Status Review
Review Date = 01/15/2009
ScoreU - Unknown
ScoreG - 200,000-2,500,000 km squared (about 80,000-1,000,000 square miles)
Comment220207 square kilometers based on Natural Heritage Program range maps
Area of Occupancy
ScoreH - >20,000 km squared (greater than 5,000,000 acres)
Comment40,945 square kilometers based on GAP predicted model.
ScoreE - Relatively Stable (±25% change)
CommentMature conifer and mixed conifer forest and riparian habitats have declined since European arrival, but are probably stable within +/-25%.
ScoreF - Increasing. Increase of >10% in population, range, area occupied, and/or number or condition of occurrences
CommentBreeding Bird Survey (BBS) data is of moderate credibility in Montana and shows an increase of 5.3% per year since 1980 which is a 68 percent increase over a 10 year time period. Surrounding states also show increasing trends. CBC also shows relative stability with possible declines in last couple of years.
ScoreB - Moderate and imminent threat. Threat is moderate to severe and imminent for a significant proportion (20-60%) of the population or area.
CommentLoss of mature forests with high canopy cover due to fire and beetle kill
SeverityModerate - Major reduction of species population or long-term degradation or reduction of habitat in Montana, requiring 50-100 years for recovery.
CommentLoss of mature trees takes a long time to recover canopy
ScopeModerate - 20-60% of total population or area affected
CommentFire and beetle kill are drastically changing a large portion of the landscape
ImmediacyModerate - Threat is likely to be operational within 2-5 years.
CommentOngoing but could accelerate
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.
CommentRely on mature forests with dense canopies, but these are widespread