Anthropogenic land use change is dramatically altering the structure and composition of wildlife communities. Landfills represent a unique environment for wildlife, simultaneously providing a massive food subsidy from human waste and often encompassing ecologically-valuable habitat types. In this thesis, I use community science data to quantify characteristics of bird communities at landfills across the United States. Landfills were found to have frequent sightings of human-adapted generalist species, including a widespread invasive species. However, landfills additionally harbored several species of habitat specialists, including declining grassland birds. Based on this finding, I compiled guidelines for landfill managers to establish and maintain bird-friendly grasslands on landfill caps. By planting native species that provide high-quality foraging and nesting habitat, and adopting bird-friendly mowing schedules, landfills can benefit birds and provide opportunities for local community engagement. The findings of this thesis suggest that landfill properties present an opportunity for conservation of grassland species.