This research study showed how important native plants are to their ability to raise young. This study likely relates to other songbirds as well. They depend on the insects that munch on native plants. The goal should be 70% or more native plants in your landscape.
The results showed that, as the proportion of a habitat’s nonnative plant biomass increases, chickadees are forced to change their diet and are less able to successfully reproduce. If more than 30 percent of total biomass in a given area is nonnative, chickadees are not able to maintain a stable local population.
Ecologists Have this Simple Request to Homeowners—Plant Native - Smithsonian https://apple.news/AWOGQX-MNQluGHhL0obnZHQ