Misc: maxillary palps, abdomen, and metathorax are parts of an ______?

Questions

The 'sockeye' is a species of which fish?

The most famous work by Edward Gibbon is on the decline and fall of which empire?

What is the more common name for the condition 'hypermetropia'?

What kind of animal is a leatherback?

The famous bridge at Avignon was built over which river?