Green-winged Doves or Emerald Doves are either found solitary or in pairs. They have a tendency to be shy, so despite their commonality, they are rarely seen. These birds spend very little time up in the trees, usually reserved for roosting. As with all other pigeons and doves, the green-winged dove produces crop milk. When the chicks are born, they poke their bills into the parent’s throat and drink it. This proves to be a great advantage as parents do not have to constantly forage for food.