When tracking animals in Africa, guides rely on spoor (tracks and dung) to let them know where and when animals are present. African Animal Tracks is the perfect pocket-sized, folding guide for nature enthusiasts wanting to learn more about the science of tracking many of these nocturnal species. Beautiful illustrations highlight more than 80 species and their signs. Laminated for durability, this lightweight guide is a great source of portable information and ideal for field use by novices and experts alike. Made in the USA.
When children learn to recognize and read animal tracks they’re actually mastering an ancient language of shapes and patterns—and gaining knowledge of the natural world. Acclaimed artist and naturalist Jim Arnosky has created a breathtaking and informative reference on the subject, filled with intricately drawn prints from creatures both wild and domestic, as well as large-scale paintings of the animals in their environment. Some of the art, labeled in Arnosky’s own handwriting, even looks as if it came straight out of his personal notebooks. And best of all, many of the tracks are true to size, so kids can compare the trace left by a big-footed polar bear (whose paws act as snowshoes in its icy home) with that of a small bird. Adding to the eye-catching illustrations are four awesome gatefolds that display paintings of a bobcat, wolf, deer, and a variety of hoofed animals right next to their prints. Every spread has plenty of details on how to interpret the footprint, and the featured menagerie includes bighorn sheep and goats, chipmunks and rabbits, grizzlies and brown bears, horses and burros, domestic cats and dogs, and even slithering reptiles! This is the perfect gift for a budding naturalist, animal lover, or artist.
A proper quality of a track and other infrastructure objects represents a basic requirement for train safety and punctuality. Most of the physical systems and their components deteriorate over time. This affects performance and may lead to failures. Albert Einstein said, "You have to learn the rules of the game. And then you have to play better than anyone else." Only if we understand how the whole system works, taking into account its imperfections and how they influence its quality and performance will we be able to learn the rules of the game and "play better." The book provides the readers with the necessary functional knowledge of track behaviour and comprehensively covers the function of the various track components, their interaction as elements of the track system, as well as the interaction of the track with railway vehicles. By presenting important tools for a deep understanding of track-behaviour this book aims to be a reference guide for infrastructure managers and to help them to find ways improving track quality for optimum long-term behaviour.