Clams And Snails

Defines mollusks, such as land snails and pearl oysters, and describes their physical features, life cycles, habitats, sense, food, and means of self-defense.

Provides information about the physical characteristics, habits, and behavior of snails and such related species as clams, oysters, and cuttlefish.

The beautifully written story of shells and their makers, and our relationships with them. Seashells are the sculpted homes of a remarkable group of animals: the molluscs. These are some of the most ancient and successful animals on the planet. But watch out. Some molluscs can kill you if you eat them. Some will kill you if you stand too close. That hasn't stopped people using shells in many ways over thousands of years. They became the first jewelry and oldest currencies; they've been used as potent symbols of sex and death, prestige and war, not to mention a nutritious (and tasty) source of food. Spirals in Time is an exuberant aquatic romp, revealing amazing tales of these undersea marvels. Helen Scales leads us on a journey into their realm, as she goes in search of everything from snails that 'fly' underwater on tiny wings to octopuses accused of stealing shells and giant mussels with golden beards that were supposedly the source of Jason's golden fleece, and learns how shells have been exchanged for human lives, tapped for mind-bending drugs and inspired advances in medical technology. Weaving through these stories are the remarkable animals that build them, creatures with fascinating tales to tell, a myriad of spiralling shells following just a few simple rules of mathematics and evolution. Shells are also bellwethers of our impact on the natural world. Some species have been overfished, others poisoned by polluted seas; perhaps most worryingly of all, molluscs are expected to fall victim to ocean acidification, a side-effect of climate change that may soon cause shells to simply melt away. But rather than dwelling on what we risk losing, Spirals in Time urges you to ponder how seashells can reconnect us with nature, and heal the rift between ourselves and the living world.

Readers interested in expanding their knowledge of the animal world are introduced to the different types of mollusks in this accessible and engaging text that complements science curriculum topics. Basic facts about these fascinating sea creatures, which include snails, clams, mussels, squid, and octopi, are explored as readers learn about their nutrition needs, reproductive stages, and their life cycles. Creative design elements give readers a better idea of exactly what each kind of mollusk looks like. Helpful graphic organizers and fun fact boxes also add extra insight into this subject.

Provides information about the physical characteristics, habits, and behavior of snails and such related species as clams, oysters, and cuttlefish.

This up-to-date guidebook on freshwater invertebrates of the central European region is a richly illustrated work, providing an excellent source of systematic information on freshwater macroinvertebrates. Numerous colour photos and additional vector graphic figures allow readers to identify specific species at a higher taxonomic level (family). The book is supplemented by video sequences. Freshwater Invertebrates in Central Europe – A Field Guide is a must-have for all those interested in the freshwater animals of central Europe such as animal scientists and ecologists, as well as students attending classes on freshwater invertebrate.​