- Illustrations of more than 777 species and regional populations
- New designs improves side-by-side comparison of species
- 5,069 painting digitally remastered from original art for perfect reproduction
- Revised text includes updated and expanded habitat information, voice, and description of behaviors.
- More than 650 color maps showing winter, summer, migration, year-round, and rare ranges
- Revised taxonomic order and most current common names for everyspecies