The best birdwatching is provided by the wetland habitats of the Thames, especially the estuary, and the flooded gravel pits by it and its tributaries, many of which are dedicated nature reserves with facilities. Otherwise, the woodland, heaths and parks the network passes through will provide wildlife spotting opportunities. The deer parks are marked^.
Top eight earn asterisks:
- *Arc 1: Amwell Nature Reserve, Lee Valley Country Park
- Arc 2a: Walthamstow marshes
- Arc 2b: Mudchute Farm
- *Arc 3: Thames estuary S; Woolwich to Dartford
- Arc 4: Lullingstone Country Park
- Arc 7: North Downs, Ranmore to Shere
- Arc 8b: Chobham Heath
- Spoke 1N: Broxbourne woods NNR
- Spoke 1E: Turkey Brook path
- Spoke 6-7: Bushey Park^
- Spoke 7 link: Bedfont lakes
- *Spoke 7a & Arc 9: Windsor Great Park (Virginia Water)^
- *Spoke 8 S & Arc 9: Jubilee River
- Spoke 8 link: Slough Arm Canal
- Spoke 8N: Langley and Black parks, Burnham Beeches
- Spoke 8-10: Colne Valley Park (Denham and Rickmansworth)
- *Spin-off 1-2-3: Ingrebourne valley (Essex Wildfowl Trust)
- Spin-off 2: Weald Country Park^
- *Spin-off 3: Thames estuary N: Rainham to Tilbury (Purfleet RSPB)
- *Spin-off 4: Thames estuary S; Dartford to Gravesend (Botany Marsh)
- Spin-off 5: Kentish Weald (Knowle Deer Park)^
- *Spin-off 9: Basingstoke Canal
- Spin-off 11: Ashridge Estate