Crossland, A. C. (2013). Wetland bird monitoring at the Avon-Heathcote Estuary and Bromley Oxidation Ponds, Christchurch: August 2009 to July 2010. Notornis 60(2), 151-157.

This paper by Christchurch City Council ornithologist, Andrew Crossland, summarises the results of wetland bird monitoring which occurred in the Avon-Heathcote Estuary and Bromley Oxidation Ponds between August 2009 and July 2010.

Overall, 38 wetland bird species were recorded in total, 12 of which exceeded 1000+ individuals during at least one month of the study period. 10 species were recorded in numbers that met or exceeded the 1% Ramsar international significance thresholds as determined by Wetlands International. These species included the pied cormorant, paradise shelduck, grey teal, New Zealand shoveler, New Zealand scaup, South Island pied oystercatcher, variable oystercatcher, eastern bar-tailed godwit, black-billed gull, and Caspian tern. The 5 most abundant species recorded during the monitoring period were the New Zealand shoveler (7046), grey teal (5881), New Zealand scaup (5739), red-billed gull (5000+), and South Island pied oystercatcher (4844).