Untitled Itemgarden_bird_counts_experimental suagr water feeders_Auckland_2019-2020

To understand the effect of sugar concentration on diversity of garden birds and the abundance of nectarivorous species at sugar water feeders in urban areas, we recruited 17 volunteer gardens with no previous feeding history in Auckland, New Zealand. We installed Tui Nectar Feeders™ and randomly assigned either 10 or 20% sugar concentration to each garden. Then we conducted a series of early morning 5-minutes bird counts prior and after feeder installation in gardens with both low and high sugar concentrations. This dataset is the summary of all the bird counts from these experimental gardens conducted in 2019 and 2020.