Nod, some cracking suggestions re compact bino’s but as you rightly say it’s best to get your own Mk1 eyeballs to a pair to check whether they are suitable. But, as you mention Amazon and their excellent returns policy, may I suggest these rather special bino’s which I bought after using a friends pairs on a photo walk:
Compact very close focus binoculars ideal for observation of butterflies, dragonflies, other insects, flowers and objects in museums as well as genera
www.bestbinocularsreviews.com
Amazon have them for around the £100 mark or £90 as new in the Warehouse but it is always worth a shop around. I have some lovely bino’s, GPO, Hawke Frontier and Steiners but for sheer portability and lightness the little Pentax’s take a bit of beating.