S1:	Sun birds are among the smallest of Indian birds.
P :	Though they are functionally similar to the humming birds of the New World, they are totally unrelated.
Q :	They do eat insects too.
R :	They are also some of the most brilliantly coloured birds.
S :	sun birds feed on nectar mostly and helped in pollination.
S6:	Our common sun birds are the purple sun bird, the glossy black species and purple rumped sun bird, the yellow and maroon species.

The Proper sequence should be: