Asian Waterbird Census (AWC) has recorded a decline in the migration of Great Egret (tagak) into the waters of Batangas. This decline can be attributed to the Taal volcano eruption in 2020 which altered the geographical features of mangroves and increased water levels in rivers situated in Barangay Palanas in Lemery, Batangas.
Four hectares of mangrove were destroyed following the eruption almost three years ago. These mangroves served as a roosting and feeding site for water birds that seek and temporarily inhabit places with warmer weather and with a more abundant food source. Migratory birds are instrumental in keeping the balance in pest control, plant pollination, and food source in a certain ecosystem.
The monitoring effort of DENR-CENRO Calaca Conservation and Development Section last January approximated that 3,320 and 950 water birds have migrated to Barangay San Diego, Lian, Batangas, and Barangay Palanas, Lemery, Batangas, respectively.
The mangrove area in Barangay Palanas is constantly being observed for possible restoration.