The study looked at different types of environments to see how they affect the diversity of bird communities. They found that farmland had higher diversity than forests and grasslands. Forests had birds with a lot of evolutionary history. The relationships between different diversity measures changed depending on the environment. For example, the richness of bird species was linked to how evenly distributed they were in farmland, but not in forests or grasslands. This means that conservation plans need to consider the specific environment when trying to protect bird diversity.