Hi, Dinesh ji,
There is only one group under 'Biology' (i.e. "efloraofindia) [as there is no separate heading either for 'Botany' or 'Taxonomy' under google groups as per
http://groups.google.co.in/group/indiantreepix/manage_dir?nav=16823622], with more than 1000 messages per month & only 23 groups with members more than 1000 (out of 2500 odd google groups in the world) as per:
And there is hardly any activity (messages per month) in these 23 groups (with members more than a 1000) as per link:
Yahoo groups are irrelevant here as these don't store Images in archives as Google groups do.
Now I can confidentially say that ours is the most active group in Biology in the world.
India has come up fast at the world stage.
And we lead the world in this area (Efloraofindia).