I have stumbled onto two interesting videos here, one dealing with how Apis Cerana is disappearing in certain regions in the Himalayas under many pressures and how there are far more solitary bee species than social bees and how important they are in their own right:
Apis Cerana:
https://www.youtube.com/watch?v=wR8vVhuAPg0
Far more solitary bees that have co-evolved with plants (from Cornell U):
https://www.youtube.com/watch?v=yBjcdinWdXg
Enjoy!
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