Is this a yellowbelly?

Killerbee yellowbellies?
killerbee #1
http://tapatalk.imageshack.com/v2/15...7a51810251.jpghttp://tapatalk.imageshack.com/v2/15...0066250590.jpg
Killerbee #2
http://tapatalk.imageshack.com/v2/15...61c49db49d.jpghttp://tapatalk.imageshack.com/v2/15...4895cd51f5.jpg

i'm by no means an expert, but i'd guess not YB

I wanna say YB on the first but not the second. But more opinions would be better because I'm no expert lol

i will say the same number one yb , number two not yb