Here's a great article on pollinators that just came out in The Atlantic! It discusses the importance of habitat connectivity and how The Pollinator Pathway group was able to create a large wildlife corridor in Seattle for native bees .
"Tiny Pollinators Need Wildlife Corridors Too"
https://www.theatlantic.com/science/archive/2017/01/pollinator-pathway/513395/
"Tiny Pollinators Need Wildlife Corridors Too"
https://www.theatlantic.com/science/archive/2017/01/pollinator-pathway/513395/