Crows are just smart enough to change with the times. They are no way responsible for harming any species. In fact they strengthen species by culling the weak. All are good. Gold finches just like thistle seed.
Some birds just eat insects and so like a pond.
The sprinkler birdbath helps them clean their wings and drink. Keeping cats indoors also helps. Some like very tall trees, others like small trees. Variety seems to be important. Nest boxes also help.