To me it [vaguely] resembles a bumble bee. I have never heard of this behaviour or defensive strategy in Saturniidae moths, but it is incredibly interesting. Bees are common models in mimicry systems - especially in mimetic flies (e.g. Syriphidae). By resembling bees or wasps (sometimes relatively poorly) mimetic flies avoid persecution by birds so there is no reason to think that a similar strategy wouldn't work for these moths. Please leave a comment if you have any information about this species or thoughts of the defense mechanism !
I didn't get a look to see if it also has eyespots hidden in the wings. This would be interesting to know, because so many Saturniidae moths have eyespots. It is possible that this one does too and just doesn't use them. It would be interesting to know whether this species evolved from an ancestor that used the eyespot-defence. IF so then it raises some interesting questions:
· What conditions made individuals with the bee mimic defence better than ancestors with eyespots?
· Why don't more Saturniidae moths use a similar defence?