Chestnut-breasted Manakin is Chestnut-breasted Munia I believe
notou = New Caledonian Imperial-Pigeon (Ducula goliath) according to this source
http://www.notornis.org.nz/free_issues/Notornis_50-2003/Notornis_50_3_155.pdf
Regarding Frigatebird, both lesser and great should be in the area, which one was seen in a visit is difficult to know.
New Caledonian Friarbird Philemon diemenensis Endemic should be the only Friarbird according to Avibase
On the other hand there is a slew of honeyeaters there ... and two fantails: gray and streaked
three species of white-eye and a silvereye
Three Cuckoo-shrikes, however, New Caledonian Cuckoo-shrike is endemic and therefore notable ...
Edit: Melanesian Flycatcher Myiagra caledonica is the only one labeled as flycatcher, even though several other species has that behavior
For the bittern, Australasian is listed as extirpated/endangered, so probably not much chance of seeing that one. Black in not on the list for NC
White tern seems to be Common White Tern. On the other hand, noddy could be any of several (even though I always suspect brown noddy when noddy is written without qualifyer, as BN is the most common species in most places. On the other hand, Brown tern could also refer to this: really too much of a guessing game).
Australian White-eyed Pochard - New Caledonia (Hardhead?) - I agree
Banded Rail - Farino sounds like Buff-banded Rail (Gallirallus philippensis)
Metallic Pigeon Columba vitiensis is on the list
Ducula pacifica which is Pacific Imperial Pigeon: there must be a mixup in Opus, as the bird is listed with least concern by Birdlife International!
http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=2718&m=0
New Caledonian Rainbow Lorikeet : I think this is the case of a local subspecies. Avibase has Rainbow lorikeet split much more than Opus, but even so, no New Caledonian RL. There was a New Caledonian Lorikeet according to Opus, but that one has not been seen for almost a century.
Golden Cuckoo: I wont start guessing which of the four species of Cuckoos. Avibase finds a Golden Cuckooshrike which does not overlap
Long-tailed Cuckoo: Long-tailed Koel Eudynamys taitensis
White-bellied Swiftlet - New Caledonia. Glossly Swiftlet - but I don't see N.C mentioned in distribution: included in the distribution in Avibase. This is still one of the weak spots in a lot of the Opus entries I have looked more carefully at.
Horned Lorikeet: there is a Horned Parakeet Eunymphicus cornutus Endemic according to Avibase
New Caledonian Grassbird Megalurulus mariae will probably take care of the grass warbler
Silvereye (Zosterops lateralis) is the only one among a number of hits that also appear in NC when I searched for Gray-backed white-eye
New Caledonian Crow Corvus moneduloides Endemic is supposedly the only crow
For the very ambigous species, it probably is best to PM the original contributor.
Cheers
Niels