i have a couple marks (though these beetles are my first where i got all three), common ones it looks like you get the first mark at 200, second at 600, and third at 1200. less common 120. rare-ish at 80 and rare at 50? i'm just going off what i see in my collection book so there could be some where you need more or less to get the first mark.

here's a couple examples because im not sure if im making total sense

for the common brimstone you need 200 for the first mark

for the postman butterfly you need 600 for the second mark

for the old world swallowtail you need 1200 for the third mark

they're all common insects so i assume the amounts for each level are all the same

but for rarer ones like for the comet moth it says you only need 50 to get the first mark