Understanding the Bird Populations Prior to the eradication of pests from Pomona and Rona Islands, staff and students from the University of Otago completed five-minute bird counts at a number of sites on both islands. Since December 2007, the Trust has conducted five-minute bird counts at the same locations.
Between 2005 and 2009, Pomona has seen an increase of 100% in the number of birds counted. A graph is available here.
Many species of native birds have increased in number during the counts since 2005. Thesze include bellbird, brown creeper, fantail, grey warbler, rifleman, tomtit and tui. A graph for many species is here.
Since May 2008, the Trust has also carried out five-minute bird counts at a much larger number of sites on Pomona Island. These counts are completed by volunteers 4 times a year and help us to understand how the "relative abundance" of birds varies from year to year and from season to season. A graph of the results of these counts is here.
Each count involves a small team of volunteers listening and watching for 5 minutes at a given location. The number of birds seen or heard is recorded during the count together with information on the weather, background noise and time of day.