Madagascan bird that's not in my book.

 Hi, I am not a birder as such but I do like to know what I see.
I saw this in the North of Madagascar, near Russian Bay. The obvious candidate is the Madagascan Bee Eater but all the illustrations I can find show them as green and without the white undersides.
The second picture was taken 100 yards from the first and was what I was expecting to see.
Can't see any reference to significant colour variations so I am puzzled.
Advice please.