Grey Arches
Polia nebulosa
Species account (old)
[...] In Durham, it is [...] a very local insect, where it is found in only three broad areas. Its stronghold is obviously the Derwent valley, where it was first noted, in the larval state, by J. W. H. Harrison in Chopwell Wood in March 1929. In recent times D. A. Sheppard and M. Eyre have taken it at six other stations in the valley, from Thornley Wood up to Park Wood. A second well-established colony is noted by the Sacriston collectors in Charlaw Woods and Sacriston Wood, and thirdly, it occurs regularly in the Hamsterley Forest trap. There is also a record of a single specimen at the Durham University Field Station in Houghall Wood in 1968.
Statistics
| Records | 58 |
|---|---|
| Individuals | 95 |
| Largest Sample | 14 |
| First Recorded | 1899 |
| Last Recorded | 2006 |
| Earliest Adult Record | 13/06 |
| Latest Adult Record | 24/08 |
| Monad Coverage | 0.6% |
| Hexad Coverage | 16.7% |
Map
This map shows all records of Grey Arches - Polia nebulosa in the Durham (VC66) database per monad (1km grid square). The map can be explored further by zooming and panning, can be reset using the button on the left, and can be filtered by selecting the era. Click on a monad to view a full list of species recorded in it, or its containing hexad (10km grid square).
Map (image)
The distribution of Grey Arches - Polia nebulosa is additionally shown in the image below. This is to allow for backwards compatibility with older browsers that cannot load the map above.
Week graph
This graph shows the County Durham (VC66) records of Grey Arches - Polia nebulosa per 7-day period, differentiated by life stage. Hover over/tap the graph to see an exact count of records at that point in time. Hover over/hold the life stage legend to highlight a particular life stage; click on a life stage label to remove it from the graph. The graph can be filtered further by selecting the era.
The graphs below show the total records and individuals of Grey Arches - Polia nebulosa in County Durham (VC66) per time period. Hover over/tap the graph to see an exact number of records and individuals at a particular point in time. Hover over/hold a label to highlight a particular metric; click on a metric label to remove it from the graph.
Era graph
Year graph
Gallery
This gallery shows images of Grey Arches - Polia nebulosa taken by County Durham (VC66) recorders. Clicking on a photo opens it in a large lightbox with a full caption, and the arrow buttons move between photos. If you would like to contribute any photographs, particularly of any stages not captured here, please email admin@durhammoths.org.
Foodplants
This is a list of foodplants used by the larval stages of Grey Arches - Polia nebulosa.
Habitats
This is a list of habitats where Grey Arches - Polia nebulosa can be found.