Unfortunately certain wild animals are not 'transient' and are very much here to stay if you have a garden of tasty plants or attempt to feed birds. Rabbits are my main nuisance animal for eating plants, closely followed by squirrels on the bird feeders. Then there are wood pigeons, mice and bank voles and magpies. Even the blackbirds root around my newly seeded vegetable bed for worms. All permanent residents. This is before the slugs and snails get going on the plants.
As for 'weeds', I let most plants grow where they can as they must be rabbit resistant. We have a lot of cuckoo flower out at the moment with associated transient orange tip butterflies laying eggs. Weeds are plants that swamp others whether cultivated or accidental eg Cleavers is a weed (accidental), as is also the planted Fox and Cubs (big mistake)