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Thirty-two native and exotic birds have been recorded from Tiromoana Bush. Calls that were possibly tui have also been heard, although no birds have been seen and this species is considered rare in Canterbury.
The most common native forest and shrubland birds are bellbirds and grey warblers. Silvereyes and fantails are moderately common, and kingfisher and shining cuckoo occasional. Of the exotic forest and shrubland birds, chaffinches, redpolls, goldfinches, greenfinches, blackbirds, song thrushes and dunnocks are all widespread. Yellowhammers are generally associated with pasture though they were occasionally recorded at forest edges, and Californian quail, magpies and particularly starlings tended to be more localized though magpies were often seen flying between patches.
Native birds on wetlands included paradise shelducks, pied stilt and New Zealand scaup, with grey teal recorded for the first time in 2006. Mallard ducks and Canada geese are common on wetlands. A wide range of exotic birds are dominant in pasture including Californian quail, dunnock, yellowhammer, skylark and magpie.
The following is a list of birds recorded from Tiromoana Bush:
Forest, shrubland and pasture species
Coastal and wetland species
The invertebrate fauna of the Tiromoana Bush beech remnant has been surveyed and comprises common species typical of both beech forest and the surrounding pasture. A population of the native carnivorous land snail Wainuia edwardii has been recorded near the road at Mt Cass/Tiromoana Scenic Reserve (DOC record December 2001). This is an outlying population of a species whose main distributional range is centered around Kaikoura. However, no snails have been found within Tiromoana Bush, probably because potential habitats are restricted relative to the Mt Cass site due to historic and current grazing.
An unidentified skink has also been recorded from Tiromoana Bush.
Australasian harrier, Australian magpie, Bellbird, Blackbird, California quail, Chaffinch, Dunnock (hedge sparrow), Goldfinch, Greenfinch, Grey warbler, Kereru (wood pigeon), Redpoll, Shining cuckoo, Silvereye, Skylark, Song thrush, South Island fantail, Starling, Tui?, Welcome swallow, Yellowhammer
Black swan, Canada goose, Grey teal, Little shag, Mallard duck, New Zealand kingfisher, New Zealand scaup, Paradise shelduck, Pied stilt, Southern black-backed gull, Spur-winged plover, White-faced heron