| Site of Special Scientific Interest | |
 | |
| Location | Hampshire |
|---|---|
| Grid reference | SU 640 065[1] |
| Interest | Biological |
| Area | 69.1 hectares (171 acres)[1] |
| Notification | 1984[1] |
| Location map | Magic Map |
Portsdown is a 69.1-hectare (171-acre) biological Site of Special Scientific Interest on Portsdown Hill, on the northern outskirts of Portsmouth in Hampshire.[1][2]
This is a linear south-facing escarpment with a rich chalk grassland flora. The diverse insect fauna includes all the chalk downland butterflies and a population of the largest British bush cricket, Tettigonia viridissima. On the lower slopes, raised beaches indicate former sea levels.[3]
References
- 1 2 3 4 "Designated Sites View: Portsdown". Sites of Special Scientific Interest. Natural England. Retrieved 17 May 2020.
- ↑ "Map of Portsdown". Sites of Special Scientific Interest. Natural England. Retrieved 17 May 2020.
- ↑ "Portsdown citation" (PDF). Sites of Special Scientific Interest. Natural England. Retrieved 17 May 2020.
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50°51′14″N 1°05′31″W / 50.854°N 1.092°W
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