i have completed the butterfly collection and the prize for that is the population maximum is increased by 5, although i have no idea what the max population is i have a population of 65.

I believe the max is 120? 95 base, 5 for each collection, and I don't know what the rest is...

ok thanks

I have completed butterfly and beetle collections and have 100 people and game says 'I have reached my maximum' so from that I assume that its 5 extra people for each collection leaving 90 as maximum without any completed collections and with 2 more completed collections will be another 10 people so 110 seems to be the maximum population unless more than 5 extra people are allowed for last 2 collections.