TL;DR: From genetic, behavioural and morphological data, the two Eunymphicus taxa should be considered separate species, a suggestion that is supported by ecological data as well as anecdotal data on hybridisation from captive birds.
Abstract: We revise the taxonomy of the two parakeet taxa in the psittaciform genus Eunymphicus – E. cornutus cornutus (Horned Parakeet) and E. c. uvaeensis (Ouvea Parakeet) – which are restricted to New Caledonia and the Loyalty Islands, in the south-western Pacific, and we investigate their relationship with the genera Cyanoramphus, considered traditionally as its closest related genus, and Prosopeia. We used three sets of characters to assess the level of differentiation between the Eunymphicus taxa: behaviour (vocalisations), morphology (biometrics and plumage coloration) and genetic (mitochondrial cytochrome b DNA sequence variation, 924 nucleotides). The analysis of vocalisations revealed significant differences, as did morphological analyses (size and number of feathers of the crest, size of the bill, and colour pattern of the head). Genetic distance between the Horned and Ouvea Parakeets is similar to that recorded between closely related species of Cyanoramphus and both taxa possess novel and diagnostic synapomorphic substitutions. From these genetic, behavioural and morphological data, the two Eunymphicus taxa should be considered separate species, a suggestion that is supported by ecological data as well as anecdotal data on hybridisation from captive birds. Our molecular data also support the traditional view that Cyanoramphus is the closest relative of Eunymphicus, with Prosopeia a sister group to this clade. The consistency with which Platycercus clusters next to the Cyanoramphus–Eunymphicus–Prosopeia grouping suggests that Platycercus may well be the next closest relative of this clade.
TL;DR: The avifauna of the Loyalty Islands comprises 62 species, including 14 breeding or erratic seabirds, 5 migratory birds, 7 herons, ducks and rails, 4 birds of prey, 28 indigenous land breeders and 2 species introduced from the Grande Terre (main island of New Caledonia) as discussed by the authors.
Abstract: The avifauna of the Loyalty Islands comprises 62 species, including 14 breeding or
erratic seabirds, 5 migratory birds, 7 herons, ducks and rails, 4 birds of prey, 28 indigenous land breeders
(belonging to 33 subspecies) and 2 species introduced from the Grande Terre (main island of New
Caledonia). Six species are endemic: 3 on the Grande Terre and in the Loyalty Islands (New Caledonian
Friarbird Philemon diemenensis, Green-backed White-eye Zosterops xanthochrous, Striated Starling
Aplonis striatus) and 3 only found in the Loyalty Islands (Ouvea Parakeet Eunymphicus uvaeensis,
Large Lifou White-eye Zosterops inornatus and Small Lifou White-eye Z. minutus). Eunymphicus is an
endemic genus of New Caledonia. Eight subspecies are endemic to both the Grande Terre and the
Loyalty Islands and 11 are exclusive of the Loyalty Islands. Of the 24 taxa whose geographical origin
could be identified, 58% are identical or similar to those on the Grande Terre, 105 km away, and 42%
have affinities with birds in Vanuatu, twice as far away (225 km). The paths of cyclones could explain
the specific influence of Vanuatu. The correlation between the islands’land area and the number of species
that have successfully settled is very close (r = 0.97) and confirms this biogeographical standard.
The land breeding species frequencies vary, with rare localized species limited to some islands (Bluefaced
Parrotfinch Erythrura trichroa, Ouvea Parakeet), or possibly extinct (Island Thrush Turdus poliocephalus)
and others whose frequency varies widely from place to place (Fan-tailed Cuckoo Cacomantis
flabelliformis, Gerygone Gerygone flavolateralis, Silvereye Zosterops lateralis), while others show
high (Red-bellied Fruit-Dove Ptilinopus greyii), average (Melanesian Flycatcher Myiagra caledonica,
Sacred Kingfischer Todiramphus sanctus) or low (Emerald Dove Chalcophaps indica) frequencies that
remain comparable between these islands. The species ecology has been determined with some species
associated with wide forests, e.g. the Ouvea Parakeet, while others are typical of the open settings. The
threats onto this avifauna are mainly linked to habitat destruction and the impact of introduced species.
A specific effort should be made to ensure the protection of populations of that species for which there
is the greatest concern, i.e. the Ouvea Parakeet
TL;DR: Evidence for cooperative breeding in two endemic parrot species of New Caledonia, the NewCaledonian Parakeets and the Horned Parakeet, is provided and genetic analyses showed that males shared paternity.
Abstract: We provide evidence for cooperative breeding in two endemic parrot species of New Caledonia, the New Caledonian Parakeet (Cyanoramphus saisseti) and the Horned Parakeet (Eunymphicus cornutus) We intensively monitored 11 breeding attempts in two nests of New Caledonian Parakeets over 5 years, and noticed that two males of different size fed the female and the chicks in each nest During one breeding attempt, the larger male guarded the female and the smaller male tried to copulate with her inside the nest Genetic analyses showed that males shared paternity During 17 breeding attempts in 11 Horned Parakeet nests, we observed two pairs sharing a nest on one occasion but we never saw feeding helpers
TL;DR: Relationships and taxonomy in the parrot subfamilies Nestorinae, Loriinae and PIatycercinae are reviewed, using published information and museum material and it is proposed that they be placed in a separate subfamily (Psittaculirostrinae).
Abstract: Relationships and taxonomy in the parrot subfamilies Nestorinae, Loriinae and PIatycercinae are reviewed, using published information and museum material. These subfamilies seem to form a monophyletic group. The Neotropical genera Forpus, Amoropsittaca, Psilopsiagon and Bolborhynchus appear to be more closely related to other Neotropical parrots than to any member of this Old World group. Within this group, the Loriinae appear to have arisen from a. platycercine-Iike ancestral stock, with the fig-parrots Psittaculirostris showing intermediate characters. Because of the marked gap between the fig-parrots and other groups in these characters it is proposed that they be placed in a separate subfamily (Psittaculirostrinae). The Nestorinae may have- evolved from an early lory-like stock. Melopsittacus and Pezoporus are probably mere closely related to the Platycercinae than to other parrots, and Lathamus ought probably to be retained in the Loriinae, of which it may be a little-advanced form. Eunymphicus is merged with Cyanoramphus because of similarities in structure of skull, pattern of plumage, coloration, distribution and calls. Following other recent authors, Barnardius is kept separate from Platycercus.