Love birds of budgerigars are a small genus of parrots The birds are social and affectionate, have monogamous bonding, and spend long times sitting together. They originally came from Australia and Africa but they are now grown by dealers in Kolkata and sent illegally through the railways, in packed cardboard boxes with little holes for breathing, all over India. Many of them die from the lack of oxygen.In nature, they live up to 15 years. In captivity, one to two at the most.