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Presence, Origin and Seasonality

The species distribution data is supplied in shapefile format. The attribute table for this shapefile contains information on the type of distribution being presented by each polygon. The codes below are stored in 3 separate fields and represent the type of distribution. Presence describes the level of certainty we have as to the species existence in an area, Origin describes whether that species occurs in an area naturally and Seasonality describes the the period in the species life cycle in which it occurs in an area.

Please review the information below for further details.

Note: We have endevoured to create the most accurate and up-to-date distribution map possible based on a variety of published and unpublished data sources. These maps are designed to give a broad understanding of the distribution of a species as a whole and as such do not necessarily mean that the species occurs at an individual location within that broad distirbution.

Presence
1 Extant
  The species is known or thought very likely to occur presently in the area, usually encompassing current or recent localities where suitable habitat at appropriate altitudes remains.
2 Probably Extant
  The species’ presence is considered probable, either based on extrapolations of known records, or realistic inferences (e.g., based on distribution of suitable habitat at appropriate altitudes and proximity to areas where it is known or thought very likely to remain Extant). ‘Probably Extant’ ranges often extend beyond areas where the species is Extant, or may fall between them.
3 Possibly Extant
  The species may possibly occur, based on the distribution of suitable habitat at appropriate altitudes, but where there are no known records. ‘Possibly Extant’ ranges often extend beyond areas where the species is Extant (q.v.) or Probably Extant (q.v.), or may fall between them.
4 Possibly Extinct
  The species was formerly known or thought very likely to occur in the area, but it is most likely now extirpated from the area because habitat loss/other threats are thought likely to have extirpated the species and/or owing to a lack of records in the last 30 years.
5 Extinct (post 1500)
  The species was formerly known or thought very likely to occur in the area, but there have been no records in the last 30 years and it is almost certain that the species no longer occurs, and/or habitat loss/other threats have almost certainly extirpated the species.
6 Presence Uncertain
  The species was formerly known or thought very likely to occur in the area but it is no longer known whether it still occurs (usually because there have been no recent surveys).

Origin
1 Native
  The species is/was native to the area
2 Reintroduced
  The species is/was reintroduced through either direct or indirect human activity
3 Introduced
  The species is/was introduced outside of its historical distribution range through either direct or indirect human activity.
4 Vagrant
  The species is/was recorded once or sporadically, but it is known not to be native to the area.
5 Origin Uncertain
  The species’ provenance in an area is not known (it may be native, reintroduced or introduced).

Seasonality
1 Resident
  The species is/was known or thought very likely to be resident throughout the year
2 Breeding Season
  The species is/was known or thought very likely to occur regularly during the breeding season and to breed.
3 Non-breeding Season 
  The species is/was known or thought very likely to occur regularly during the non-breeding season. In the Eurasian and North American contexts, this encompasses ‘winter’.
4 Passage
  The species is/was known or thought very likely to occur regularly during a relatively short period(s) of the year on migration between breeding and non-breeding ranges.
5 Seasonal occurence uncertain
  The species is/was present, but it is not known if it is present during part or all of the year.