The USGS Native Bee Inventory and Monitoring Program designs and develops large and small scale surveys for native bees. As part of that program they also develop identification tools and keys for native bee species.

One aspect of creating those tools is creating accurate and detailed pictures of native bees and the plants and insects they interact with. On Flickr, the USGS BIML has uploaded a staggering collection of over 2,600 high-resolution photographs that are in the public domain and can be freely downloaded and used as you please.

Be sure to check out the entire collection on Flickr, the photos are amazing.