Before conducting the ground survey, previous survey results were reviewed particularly for the same survey area in 2020, to monitor the shorebird population with the suitability habitat assessment with Landsat 8 from USGS. Apart from Koe Tae Su, all other mudflat areas visited last year were revisited this year again, Areas near the main channel changed considerably within the last year (see Figure 1). The survey was carried out at the same core area in eastern Gulf of Mottama as in 2020 from 24-31 January 2021. This year survey team was forced to depart from the Aung Thar Dan village located at the Yangon Region, due to COVID-19 restrictions and crossed the channel first into Mon State by bigger boat on the 24th January 2021. There was not enough water to move the big boat at first and the survey team investigated the shorebirds nearby. On the second day on the 25th January 2021, the water level was high enough during the afternoon high tide and the boat started to move closer to the channel. The survey at the west coast was carried out for one day on 26th January 2021. The survey area was very muddy and small mangrove stands were found near the boat anchor point. Due to boat anchor and water level problems of the big boat, the survey team spent two days at the west coast. In mean time, small boats from eastern Gulf of Mottama departed on the 26th January 2021 for meeting the survey team at the assembly point at the survey point on 27th January 2021. On the 27th January evening, all the boats from east and west are gathering at the east coast and transferred the field gears to the small boats for the survey at the east coast, the big boat was anchored at a safe area to wait for the survey members to return back. The survey was timed to cover the highest spring tide because the boats could access all of the intertidal sandflats only during the high spring tide period and because shorebirds are likely to be concentrated at spring tides and gather in large flocks. This way we were less likely missing large flocks and counted the total numbers of small shorebirds (Aung et al. 2016, 2017, 2018, 2019, 2020)