Download Animal Migration (Animal Behavior) by Gretel H. Schueller PDF

By Gretel H. Schueller

Migration is likely one of the so much interesting and dramatic of all animal behaviors. From bugs and birds to reindeer and tremendous whales, many animals fly, swim, stroll, or even hitchhike looking for higher meals, milder weather, or compatible mate. a few pass complete oceans; a number of even circle the globe. those marathon trips animals take are packed with nice assessments of actual power and endurance--as good as threat and infrequently demise. In Animal Migration, study why animals are forced emigrate and many of the styles and cycles in their migrations.

Show description

Read Online or Download Animal Migration (Animal Behavior) PDF

Similar science & technology books

Lawyers, money, and success: the consequences of dollar obsession

Retired Justice Macklin Fleming argues that during its quest for funds, the felony career has overpassed its real projects and tasks, with the end result that the career is rife with consumer dissatisfaction, public mistrust, and person attorney discontent. cash is now the degree of good fortune, he says, and honesty has been diluted, whereas fiduciary accountability has eroded.

Earthquake. Perspectives on Earthquake Disasters

What's it wish to witness an earthquake? This publication appears on the  Haitian and different earthquakes, utilizing firsthand debts to explain occasions and people's stories, delivering a number of views from eyewitnesses, survivors, the emergency companies, scientists, and the media.

Hurricane. Perspectives on Storm Disasters

What's it wish to witness a storm? This ebook seems to be at typhoon Sandy and different significant storms, utilizing firsthand bills to explain occasions and people's reviews, offering a number of views from eyewitnesses, survivors, the emergency providers, scientists, and the media.

Additional resources for Animal Migration (Animal Behavior)

Example text

For something so tiny to swim through ocean water takes a great deal of energy. To zooplankton, the water is as thick as molasses. Yet, they must do it because their food source (phytoplankton, or tiny plants, like algae) is at the surface, so they go there at night to eat. During This magnified image of a drop of seawater shows it to be filled with life. Zooplankton are the smallest migratory swimmers; they migrate up and down in a process called vertical migration. They sink at sunrise to escape predators and keep cool, and then they rise at sunset to get to their food source at the surface.

Caribou may spend as many as eight months of each year wandering in small bands, looking for lichens buried under the snow. During the day, they may travel through snowstorms with 50-mile-per-hour (80 km/hr) winds. At night, when temperatures drop to –30 degrees Fahrenheit (–34 Celsius), they may rest in the center of a frozen lake. This is a safer place to watch for potential predators. A PAth through ice And mosQuitoes In April, the weather begins to shift, and so do the caribou. The days grow longer.

During this time, wildebeest also give birth to young in spectacular numbers: 300,000 calves can be born within three weeks. The young wildebeest calves are adapted to life on the move. They can run just minutes after they are born. After about two days, the calves are so hard to catch that the spotted hyenas, the main wildebeest predator, seldom bother with them. Within three days, the young calves can keep up with the herd. In May, the southern plains begin to dry out. The herds, new calves included, gradually move north and west to find more grass.

Download PDF sample

Rated 4.51 of 5 – based on 28 votes