Yes you've mentioned those two examples several times now.
The golden dart frog is a very beautiful and agile creature - I keep dart frogs, they are stunning and cute at times. This is not comparable to say, theloderma asperum - the bird poop frog or pied warty frog...
A fly... but you don't say which fly. I wonder why that is. Is it because this person has chosen a dragonfly - a beautiful, agile predator, with incredible vision and amazing flight skills.
Chances are they're not a fruit-fly eh? Miniscule, addicted to sugar and for the flightless ones, single minded in their determination to go UP, at all cost.
Sorry kiddo - if people really were revealed to have had past lives as animals, we'd be seen dung-beetle people, slug people, silverfish people etc.
Not multiple people claiming to be a tiny handful of 'cool' animals out of the billions of normal, boring, every day animals.