Look first at three physical tools that you can use right away to become a more effective birder. Consider how familiarity with the shape or silhouette of bird families, as well as bird size, aid you in focusing in on exact species. Study the color factors of pigment and keratin, as they produce the dazzling range of bird coloration, and investigate color as an identification tool.

In these 24 highly enjoyable lectures, National Geographic takes you into the multifaceted world of birding, focusing on the astonishing range of bird species in North America. With its wide spectrum of wildlife habitats, North America is an endless region of interest for birders from around the world. Within the course, you'll make an in-depth study of bird identification, covering bird size, shape, and color, flight patterns, geographic range, habitats,...

An introduction to the characteristics of the spotted dolphin.

An introduction to the characteristics of the common dolphin.

This illustrated guide examines the acoustical quality of some of the world's most important concert and opera halls and reveals how composers and musicians adapt their art to complement the acoustics of their surroundings. It should be of value to musicians and concert-goers, concert hall managers, recording and audio engineers, and acousticians.

In this colorful book about dinosaurs, you'll see amazing computer artwork that places the dinosaurs in a modern city environment with buildings, cars, trucks, bicycles, parks and construction sites. The dinosaur illustrations are accurate in relative size, shape and color. Readers will get a real sense of how enormous dinosaurs were.

An informal study of post-Stalin Russia--its accessibility, attractions, government and politics, culture, society, foreign relations, and current trends in many of these areas--based on the author's trips to Russia.

Toddlers can search, point, match, make comparisons and discover concepts such as size, shape and color with the help of cars and trucks from Disney's film Cars.