The 10 most ringed species are shown below, and these can be expected to be caught on most Fynbos bird ringing / bird banding expeditions.
Cape White-eye (Zosterops virens), Cape Weaver (Ploceus capensis), Southern Masked-Weaver (Ploceus velatus), Cape Robin-Chat (Cossypha caffra), Yellow Bishop (Euplectes capensis), Cape Bulbul (Pycnonotus capensis), Southern Red Bishop (Euplectes orix), Olive Thrush (Turdus olivaceus), Red-faced Mousebird (Urocolius indicus).
Additional interesting species that have been caught include:
Cape Batis (Batis capensis),
Fiscal Flycatcher (Sigelus silens),
Common Fiscal (Lanius collaris),
Swee Waxbill (Coccopygia melanotis),
Karoo Prinia (Prinia maculosa),
White-backed Mousebird (Colius colius),
Cardinal Woodpecker (Dendropicos fuscescens),
Olive Thrush (Turdus olivaceus),
Bar-throated Apalis (Apalis thoracica),
Southern Double-collared Sunbird (Cinnyris chalybeus),
Malachite Sunbird (Nectarinia famosa).
There is still potential for many other interesting species, especially Cape Sugarbird (Promerops cafer). 
Find out more about the expeditions: