Tuesday, August 11, 2020

Wader (Charadriiformes) and royal spoonbill (Platalea regia) use of roosts in Whangarei Harbour and Ruakaka Estuary, Northland, 1973-2000

TitleWader (Charadriiformes) and royal spoonbill (Platalea regia) use of roosts in Whangarei Harbour and Ruakaka Estuary, Northland, 1973-2000
Publication TypeJournal Article
Year of Publication2007
AuthorsBeauchamp, AJ, Parrish, GR
JournalNotornis
Volume54
Issue2
Pagination83-91
Type of Articlearticle
KeywordsCharadriiformes, counts, Northland, roost sites, Royal Spoonbill, Waders, Whangarei Harbour
Abstract

Roost sites in Whangarei Harbour and Ruakaka Estuary were used regularly by 12 wader species and 6 other species were present occasionally between 1974 and 2000. Counts at 7 roost sites in Nov, Jun/Jul, and Mar showed that 4 species, eastern bar-tailed godwit (Limosa lapponica), lesser knot (Calidris canutus), pied stilt (Himantopus leucocephalus), and South Island pied oystercatcher (Haematopus ostralegus finschi) contributed 70-99% (median 94%) of the waders. Most of the common waders used several roosts at each tide, but numbers and species richness of resident and vagrant species were greatest along the southern margin of the harbour. Changes in roost structure and proximity to feeding areas, and differences in migration patterns affected counts at individual roosts and the overall totals of wading birds counted in the harbour and its environs.

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