Bumble bees of North America: an identification guide

Introduction

Observing bumble bees

Attracting bumble bees

Bumble bee forage guide by ecoregion

Maps and seasonal activity

Bumble bee decline and conservation

Threats to bumble bees

Natural enemies

Mimicry

Distinguishing bumble bees from other insects

Bumble bee names and classification

How to use this book to identify bumble bee species

Species accounts

Square-or long-cheeked bees with a rounded angle on the midleg

Short-cheeked bees with a rounded angle on the midleg

Medium- or long-cheeked bees with a sharp angle on the midleg

Hindleg (tibia) with the outer surface uniformly convex and densely hairy (cuckoo bumble bees, no workers).