Butterflies
29 species of butterfly have been recorded at Treborth ie ,< 7% of the variety displayed by moths. They are as follows:
- Small Skipper - first recorded in 2003 and common in some years in the parkland and grassland areas
- Large Skipper – common most years in grassy areas and sometimes in woodland glades
- Dingy Skipper – rather scarce – not recorded every year – grassy areas
- Clouded Yellow – scarce – subject to irregular influx but never reported in more than ones or twos and many years goes unrecorded.
- Brimstone – a handful of records, not likely to have bred
- Large White - common
- Small White – quite common
- Green-veined White – common
- Orange Tip – quite common
- Purple Hairstreak – observed most years in July at edge of woodland; certainly breeds and population at Treborth could be quite large but many individuals frequent upper canopy of oaks so difficult to assess.
- White-letter Hairstreak – probably declined but thought to be still present on remaining elms – requires concerted census in July
- Small Copper – quite common in grassy areas
- Common Blue – common in grassy areas
- Holly Blue – quite common along woodland edge and in parkland
- Red Admiral – common most years
- Painted Lady – very variable numbers according to national influxes
- Small Tortoiseshell – has experienced a decline in recent years but still quite common
- Peacock – common
- Comma – has increased over last 40 years and now reasonably common
- Small Pearl-bordered Fritillary – has declined in last 40 years and now very scarce
- Dark Green Fritillary – very rare and no recent sightings
- Silver -washed Fritillary – just one record, c. 12 years ago.
- Speckled Wood – common; three broods.
- Wall Brown – scarce – found mainly on grassy banks near Strait
- Grayling – very scarce – no recent record
- Gatekeeper (or Hedge Brown) – common in grassland
- Meadow Brown - common in grassland
- Small Heath – now rather scarce in grassland
- Ringlet – common in grassland