Grey Wagtail Motacilla cinerea
Estimated average number of individuals by week based on eBird data, Jul 2012 to Jun 2022
Peak week Oct 08-Oct 14
Early date 01 Jul 2018
Late date 18 Apr 2021
First arrivals appear from July onwards, but numbers grow sizeable from September onwards, which is when the Yishun HDB estate wagtail roost becomes a buzz of activity.