“While lawns perform some important ecosystem functions, like storing carbon and carrying out photosynthesis, they are biodiversity barrens. Previous research on lawns has shown they are amazingly similar in species composition and contribute to the homogenization of urban landscapes and loss of urban biodiversity. They tend to consist of only one or two species of grass, dramatically limiting the potential wildlife they can support. And, since diversity begets diversity, the monolithic nature of lawns means fewer organisms can thrive there. Some birds, like American Robins, occasionally visit lawns; however, these heavily-mowed, often chemically-treated, water guzzling, homogeneous areas simply do not provide the elements of habitat needed for supporting the diversity of wildlife central to balanced ecological systems.”
Nava 