| SRANK |
Definition |
| S1 |
Extremely rare in Ontario;
usually 5 or fewer occurrences in the province or very few remaining
individuals; often especially vulnerable to extirpation.
|
| S2 |
Very rare in Ontario;
usually between 5 and 20 occurrences in the province or with many
individuals in fewer occurrences; often susceptible to extirpation.
|
| S3 |
Rare to uncommon in
Ontario; usually between 20 and 100 occurrences in the province; may
have fewer occurrences, but with a large number of individuals in some
populations; may be susceptible to large-scale disturbances. Most
species with an S3 rank are assigned to the watch list, unless they
have a relatively high global rank.
|
| S4 |
Common and apparently
secure in Ontario; usually with more than 100 occurrences in the
province.
|
| S5 |
Very common and
demonstrably secure in Ontario.
|
| SH |
Historically known from
Ontario, but not verified recently (typically not recorded in the
province in the last 20 years); however suitable habitat is thought to
be still present in the province and there is reasonable expectation
that the species may be rediscovered.
|
| 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.
|
| SU |
Unrankable, often because
of low search effort or cryptic nature of the species, there is
insufficient information available to assign a more accurate rank;
more data is needed.
|
| 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. |
