Kawakawa with ripening fruit, those already ripened having been consumed by kereu in several visits a day over recent months.

Diagnosis needed.
Herbivory may or not be a factor, but over the last 2-3 years the herbivory appears to be in excess of the tree's ability to produce foliage. This tree is c. 4mH, one of several in this suburban garden that has lost much of its foliage, with most of its remaining leaves small, pale, yellowed, with unusally numbers and size of holes in them, and with other deformities, most of them observed in this one specimen.
The tree was grown and planted about 2000-2005, from wild seed locally ecosourced (regen forest margin). Trees on both sides of the house have been similarly affected for thelast 2-3 years. It hasn't affected the fruit crop in general, though some fruit are a bit deformed (eg image 12) other than to keep the tree smaller than it would otherwise be, and birds (kereu, blackbirds) continue to feed on the fruit.

Several specimens on this garden (all ecosourced from local wild 15-20yrs ago) are now in decline. The decline started c.3yrs ago, at the same time kereru started to visit regularly and feed on fruit in Spring and summer.

Other events of note have been:

-neighbour removing a large ivy invasion of the fenceline, presumably using herbicide

• the application of a "non-toxic, organic" herbicide by a neighbour. (the only other sign of herbicide damage among numerous plants in this garden is one mature, vigorously flowering Camellia, which was right beside the fence the ivy grew on, and died within 2 weeks of the ivy removal).
• The repair of a broken and leaking stormwater-pipe near another of the affected kawakawa- unlikely to have changed water levels beneath this specimen.

exceptional amounts of holes in leaves, many leaves more hole than leaf. The overall coverage of the tree is not affected; but in a nearby garden most of the dozen kawakawa trees have become increasingly bare over the last few years, with both a similar amount of holes in the leaves, and yellowing and small size of many leaves.
Fruiting continues and kereru and Turdus continue to feed on them.

Previous obs of same group of kawakawa specimens, fruiting:
https://inaturalist.nz/observations/17117393

The herbivory of these kawakawa may not be destructive, but it is of note because of the number of trees in the nearby garden in decline, with similar large and numerous holes. obs here:
https://inaturalist.nz/observations/19878177
and another tree in the same garden:
https://inaturalist.nz/observations/19878180

While walking, I had unknowingly disturbed a small cloud of blow flies. They had been gathered around a chipmunk which I had initially presumed to be dead. However, it was still alive and somewhat mobile. Its hind legs were injured, maybe by a fall or a predator and the fur around that area appeared darker, perhaps from the leakage of bodily fluids.