Clayton to Offham Escarpment is a Site of Special Scientific Interest, which stretches from Hassocks in the west and passes through many parishes including Streat, to Lewes in the east.

Archaeologists have suggested that forest clearances may have started earlier on the thinner soils of the Lower Greensand in places such as Streat, where flint tools from the period can be found in abundance.

[5] As is true in most of the Weald, Medieval Streat had much common land for people to graze their animals, make hay and garner other resources.

The temple is now gone, but its existence explains the presence of bamboo and other exotic plants in the wood, alongside the sessile oak, gean, hornbeam and a wild service tree on the western boundary still bears seasonal fruits.

For nearly two miles north of the Downs, Streat Lane is narrow and winding, sufficiently traffic free to make walking possible with care, with tall nutty hedgerows on either side.

The western arm, Streat Lane Green (TQ 352 167), is owned by the parish council, but is managed by the residents backing on to each section.

Parts are managed sensitively for wildlife, but others are over-mown like suburban lawns, and the flowers and grasses get no chance to set seed or attract butterflies and bees (2016).

Some areas do still have archaic and rare species such as adder's tongue fern and there is a fine three span oak south of the railway, hidden on the east side boundary bank (TQ 351 164).

Where the sward is allowed to flower it is very colourful, with clovers and vetches, knapweed, fleabane, oxeye daisy, bird's foot trefoil, meadowsweet, agrimony, burnet saxifrage and wild carrot.

David Bangs, a Sussex field naturalist, describes the area as "A green lane that magics you right back to the medieval drovers' roads, meandering between thick hedgerows over uneven, damp or dry ground.

[6] The Bevern Stream's clean and clear waters flow through this parish and support trout, bullhead, minnows, freshwater mussels and caddisflies.

[9] Its national listing gives it as Grade II* and reveals its architectural merit as including its entire facing of knapped flints with long and short ashlar quoins to each window bay.

The herds of swine, cattle and sheep that have walked up and down Streat Hill over the centuries have created a deep and steep, zig-zagging bostal track.

Streat Hill bostal and scarp slope (TQ 351 130) has long been ungrazed, and as a consequence has lost most of its ancient species-rich chalk grassland to invasive scrub.

[12] To the west of the Streat Hill bostal there is the Queen Victoria Jubilee plantation (TQ 348 130), which forms the sign of a V on the middle of the bare scarp slope.