Birds - Classification.

The Howard and Moore complete checklist of the birds of the world / by: (Language materials, printed)

HBW and BirdLife International illustrated checklist of the birds of the world / by: (Language materials, printed)

Bird families of the world : = an invitation to the spectacular diversity of birds / by: (Language materials, printed)

Birds new to science : = fifty years of avian discoveries / by: (Language materials, printed)

Bird species : = how they arise, modify and vanish / by: (Language materials, printed)

Birds.

Ornithology- History- 21st century.

Birds- Pictorial works.

Birds- Identification.

Discoveries in science- History- 21st century.

Birds- Evolution.

Discoveries in science- History- 20th century.

Ornithology- History- 20th century.

Birds

Birds- Speciation.