| SRANK |
Definition |
| SX |
Presumed Extirpated—Species or community is believed to be extirpated from the nation or state/province. Not located despite intensive searches of historical sites and other appropriate habitat, and virtually no likelihood that it will be rediscovered. |
| SH |
Possibly Extirpated (Historical)—Species or community occurred historically in the nation or state/province, and there is some possibility that it may be rediscovered. Its presence may not have been verified in the past 20-40 years. A species or community could become NH or SH without such a 20-40 year delay if the only known occurrences in a nation or state/province were destroyed or if it had been extensively and unsuccessfully looked for. The NH or SH rank is reserved for species or communities for which some effort has been made to relocate occurrences, rather than simply using this status for all elements not known from verified extant occurrences. |
| S1 |
Critically Imperiled—Critically imperiled in the nation or state/province because of extreme rarity (often 5 or fewer occurrences) or because of some factor(s) such as very steep declines making it especially vulnerable to extirpation from the state/province. |
| S2 |
Imperiled—Imperiled in the nation or state/province because of rarity due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors making it very vulnerable to extirpation from the nation or state/province. |
| S3 |
Vulnerable—Vulnerable in the nation or state/province due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors making it vulnerable to extirpation. |
| S4 |
Apparently Secure—Uncommon but not rare; some cause for long-term concern due to declines or other factors. |
| S5 |
Secure—Common, widespread, and abundant in the nation or state/province. |
| SNR |
Unranked—Nation or state/province conservation status not yet assessed. |
| SU |
Unrankable—Currently unrankable due to lack of information or due to substantially conflicting information about status or trends. |
| SNA |
Not Applicable —A conservation status rank is not applicable because the species is not a suitable target for conservation activities. |
| S#S# |
Range Rank —A numeric range rank (e.g., S2S3) is used to indicate any range of uncertainty about the status of the species or community. Ranges cannot skip more than one rank (e.g., SU is used rather than S1S4). |
| SRANK |
Definition |
| C |
Captive/Cultivated; existing in the province only in a cultivated state; introduced population not yet fully established and self-sustaining. |
| S? |
Not Ranked Yet; or if following a ranking, Rank Uncertain (e.g. S3?). S? species have not had a rank assigned. |
| SA |
Accidental; of accidental or casual occurrence in the province; far outside its normal range; some species may occasionally breed in the province. |
| SAB |
Breeding accidental. |
| SAN |
Non-breeding accidental. |
| SE |
Exotic; not believed to be a native component of Ontario's flora. |
| SR |
Reported for Ontario, but without persuasive documentation which would provide a basis for either accepting or rejecting the report. |
| SRF |
Reported falsely from Ontario. |
| SX |
Apparently extirpated from Ontario, with little likelihood of rediscovery. Typically not seen in the province for many decades, despite searches at known historic sites. |
| SZ |
Not of practical conservation concern inasmuch as there are no clearly definable occurrences; applies to long distance migrants, winter vagrants, and eruptive species, which are too transitory and/or dispersed in their occurrence(s) to be reliably mapped; most such species are non-breeders, however, some may occasionally breed. |
| SZB |
Breeding migrants/vagrants. |
| SZN |
Non-breeding migrants/vagrants. |
