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The nesting of keas

Notornis, 10 (7), 319-326, 334-337

J.R. Jackson (1963)

Article Type: Paper

White heron invasion, 1957

Notornis, 10 (7), 311-315

I.G. Andrew (1963)

Article Type: Paper

From April, 1957, unusually large numbers of white herons (Egretta alba) were seen in scattered areas of New Zealand from Northland to Southland. It appears that an extensive invasion from Australia occurred. This report summarises the records in the Wildlife files. Several other Australian breeding species appeared at the same time, and these are also discussed here.

Individual and social behaviour of the southern black-backed gull

Notornis, 10 (5), 206-222, 229-232

R.A. Fordham (1963)

Article Type: Paper

The closest relatives of the southern black-back are to be found in the northern hemisphere, amongst the interbreeding assemblage of subspecies of the herring and lesser black-backed gulls. The limited available literature taken together with the results of this study shows that as far as general behaviour is concerned, no significant differences can be detected between the three species, but features of the alarm calls indicate that the southern black-back is related rather more closely to the lesser black-back than to the herring gull. General, pair-forming and hostile calls and postures have been outlined, and roosting and some aspects of general flock behaviour described. Most birds with which the gulls are in contact will concede food or space, notable exceptions being the Arctic skua and giant petrel.

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