I have a question for you all.  What techniques / tricks do you use when shooting against a very bright background?

These are snapshots from a recent visit to the Butterfly Center at Rieman Gardens, Ames IA.  These are tropical butterflies so I need help with the names.

• Butterfly 03
• Butterfly 01
• Butterfly 07
• Butterfly 08
• Looks like a B52 prototype

 Next shots of a huge moth (Atlas Moth).  Wing span of 8" to 11.5".

• Moth View 1
• Moth View 2