Rosy starling {Pastor roseus} are passerine birds that are known to migrate from Europe and Central Asia to India during winters. These are attracted to flowering trees. They roost with other starlings on trees and live in communal harmony. Trees are the backbone of all the ecosystems on which the entire living beings rely. They provide ecological harmony by emission of oxygen, absorption of carbon dioxide and the green-house gases. They improve water quality, prevent soil erosion, global warming and the natural disasters. Trees also provide food, shelter, medicines and are good for the biodiversity of flora and fauna.