I have few remarks you should count with.
Idea 1 - Not sure if understand correctly. Taking your ZOO example ... Do you want to make some sort of virtual tour through the ZOO?
If so and you want to make business of it I guess you would need ZOO approval/collaboration otherwise you can face lawsuit. I would first discuss this with the ZOO management.
Idea 2 - In my country finding a precious coins, historical items etc. and not informing relevant authorities (museum, conservationists ...) is a felony ( you can only claim small reward as a finder ). So you should first inform hows it going in your country.
Also I think there is already lot of people with detector around the world and mostly doing this as a hobby rather than business. In other words, profitability is not guaranteed.
1 - I Think to put on the site, a donation for a specific animal species
all have names
and people who who would like to leave them their gifts
even it will be possible to send parcels
what ever, a toy for example,
we do this without problems, to remove is not prohibited
2-Report it is not necessary anywhere
not yet found
found, there are two provisions
the first historical, the second is a simple
about easy can anyone not what to give
the historical 25% over its value will be attached to me
searchers have not yet so much
but the country is not too small
and people have strange're looking for, take the appliance and shy in the woods
it is easier to get an old map of the country, with villages
and their wool, as many don't even know where they are
and for the last 100 years people there were not,
the ruins, or even all under the ground
we often while hiding gold, then white, then red,
the Bolsheviks
this discover can a lot of things.