Summary details for Pardosa trailli (O.P.-Cambridge, 1873)

Species Details

Species name: Pardosa trailli (O.P.-Cambridge, 1873)
Synonym: Lycosa trailli O.P.-Cambridge, 1873
Taxonomy: Animalia :: Araneae :: Lycosidae
habitat: tall sward & scrub
habitat: upland

Distribution

The species occurs in mountainous areas in Wales, the Lake District and Scotland. P. trailli has been recorded from Sweden and Norway.

Habitat and ecology

It occurs in open stony ground on mountains, especially on scree. Both sexes are adult in May and June, and females until August.

Status

The spider is very local, but has been frequent at some sites. The species is apparently much more restricted than many other montane species and records suggest a major long term decline. It is known from only three locations since 1992. Area of occupancy has declined by 79% from 14 hectads prior to 1992 to just three since that date, but the habitat is almost certainly under-recorded

Threats

The spider's mountain habitat is vulnerable to damage through recreational pressure.

Management and conservation

Limit damage to montane vegetation as a result of recreational pressures. Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).

Stats

First recorded: 1872
Last recorded: 2025
Total records: 56
Total visits: 54

Conservation status

Pardosa trailli

Source	Reporting category	Designation	Date designated	Comments
A Review of the scarce and threatened spiders (Araneae) of Great Britain: Species Status No. 22 (Sep 2017)	Rare and scarce species	Nationally Rare. Includes Red Listed taxa	42979
A Review of the scarce and threatened spiders (Araneae) of Great Britain: Species Status No. 22 (Sep 2017)	Red listing based on 2001 IUCN guidelines	Vulnerable	42979	Although there have been some unsuccessful recent surveys of historical sites for this species its montane, scree habitat remains under-visited and this may account for some of the apparent, very substantial decline. Thus, EN is not considered likely to be accurate. While future surveys may find the species at several of the unsurveyed areas, VU is proposed under the precautionary principle. Threats: The spider's mountain habitat is vulnerable to damage through recreational pressure.

Photos and media

Spatial distribution - hectad map

Click on one of the date ranges in the key to highlight that particular range. Click anywhere else on the map to go back to all three date ranges.

Thresholds:

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Rejected records are excluded from this map. Unverified records are included.

Temporal distribution - records by year

Records that span more than one year are not included in this chart.