Beginning at Malpas, where the river is widest, check the shoreline for commoner waders, Little Egrets, Grey Heron, Mallard, wagtails and pipits. The gardens and tract of woodland opposite will add garden species to your list and watch above for raptors.
As the river narrows and you reach commerce, it is astonishing how close Redshank, Oystercatcher, Dunlin, occasional Curlew and so forth will get as you walk by them. I have recorded Black Redstart among the buildings here more than once, as well as arriving and departing warblers.
Daubuz Moors nature reserve is a small concern but none the worse for that. You may add Collared Dove and Blackcap and Chiffchaff here (both over-winter), Jackdaws, Starlings and also Magpie.
Lady’s Wood could add Coal Tit and Long-tailed Tit as well as topping up on your finches as the walk concludes. Wander up to the fort and scan for raptors which – this being Cornwall can be very rewarding. I saw one of my first Black Kites from here.