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S3 Vulnerable through its range or found locally in a restricted range (21 to 100 <br />occurrences, or 3,000 to 10,000 individuals). <br />S4 Apparently secure globally/state, though it may be quite rare in parts of its range, <br />especially at the periphery. Usually more than 100 occurrences and 10,000 individuals. <br />SS Demonstrably secure globally/state, though it may be quite raze in parts of its range, <br />especially at the periphery. <br />SX Presumed extinct globally, or extirpated within the state. <br />SU Unable to assign rank due to lack of available information. <br />SH Historically known, but usually not verified for an extended period of time. <br />B Refers [o the breeding season imperilment of elements that are not permanent residents. <br />N Refers to the non-breeding season imperilment of elements that are not permanent <br />residents. Where no consistent location can be discerned for migrants or non-breeding <br />populations, a rank of SZN is used. <br />S? Unranked. Some evidence that species may be imperiled, but awaiting format rarity <br />ranking. <br />Note: Where two numbers appear in a state or global rank (for example, S2S3), the actual <br />rank of the element falls between the two numbers. <br />