Yeah, migrating bird from Siberia not only add colors but also provide ecological benefits as they prey on insects and weeds, thus contributing towards the betterment of agriculture.
and the few species that stay behind get lots of food from the people here in order to help them
absolutely right the remaining birds get maximum share of food so there is a win-win situtaion for migratory and remaining birds.
Exactly. Sadly, the mortality rate of some of the birds that stay behind in the winter is very high!