Orchard Oriole (Icterus spurius) Conservation Status Review
Review Date = 01/21/2009
ScoreU - Unknown
ScoreF - 20,000-200,000 km squared (about 8,000-80,000 square miles)
Comment149371 square kilometers based on Natural Heritage Program range maps
Area of Occupancy
ScoreD - 20-100 km squared (about 5,000-25,000 acres)
Comment91 square kilometers based on GAP predicted model.
ScoreE - Relatively Stable (±25% change)
CommentRiparian forests relatively stable since European arrival and the species uses a variety of human habitats such as shelter belts.
ScoreF - Increasing. Increase of >10% in population, range, area occupied, and/or number or condition of occurrences
CommentBreeding Bird Survey (BBS) is of very low credibility in Montana, but shows a 21.7% increase per year since 1980 which is a 713 percent increase over a 10 year time period. All surrounding states and provinces show increasing trends roughly around a 2% increase per year or 22% increase per decade.
ScoreG - Slightly threatened. Threats, while recognizable, are of low severity, or affecting only a small portion of the population or area.
CommentNo major threat identified given that they use shelter belts and residential areas. However, loss of riparian deciduous forests and cowbirds may represent threats.
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.
CommentNo major threat to preferred habitat identified
ScopeLow - 5-20% of total population or area affected
CommentNo major threats to preferred habitat identified
ImmediacyLow - Threat is likely to be operational within 5-20 years.
CommentNo immediate threats identified
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).
ScoreC - Moderate. Generalist. Broad-scale or diverse (general) habitat(s) or other abiotic and/or biotic factors are used or required by the species but some key requirements are scarce in the generalized range of the species within the area of interest.
CommentUse a variety of natural and anthropogenic decidous habitats.