About Animals: Bigger Wrens Sing Lower Notes

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Animals Animals Animal Facts Habitat Facts Animal Pictures From Laura Klappenbach, your Guide to Animals Welcome to the Animals / Wildlife Newsletter, a weekly newsletter published every Thursday by About.com's Animals / Wildlife website. For more about animals and wildlife, be sure to stop by the blog, participate in forum discussions, and browse the growing library of animal profiles. Bigger Wrens Sing Lower Notes Recent research has revealed that the lower the pitch of a male purple-crowned fairy wren, the larger the bird. In a study led by Dr. Michelle Hall of the University... Read more Search Related Topics:  birds  conservation  Large Herbivores Dampen Effects of Climate Change The interactions betwen members of an ecological community play an important role in stabilizing those communities as climate changes, a new study suggests. Eric Post, a professor of biology at... Read more Grassland Birds Threatened by Pesticides Pesticides are causing the widespread decline of grassland birds throughout the United States, a recent study suggests. The study, led by Dr. Pierre Mineau of Environment Canada, examines twenty-three years... Read more Search Related Topics:  birds  conservation  Mammals Mammals are a group of vertebrates that includes about 21 groups such as anteaters, bats, carnivores, cetaceans, elephants, marsupials, primates, rodents and many others. There are about 5,400 species of mammals alive today. Mammals first appeared about 200 million years ago during the Jurassic Period. The articles listed below provide information about the characteristics, classification and evolution of mammals. Related Searches Birds Birds Bird Watching Animals Birds of Prey Flying Birds in Flight Featured Articles Reptiles Habitat Facts Zoology Basics Zoology Glossary Amphibians Birds   More from About.com 10 Easy Ways to Look Thinner Don't wait until you've lost those first pounds to make these simple, slimming changes. Read more...> Create a Shared Photo Stream Sharing your photo stream with friends and family is a great way to keep in touch. Read more...> This newsletter is written by: Laura Klappenbach Animals Guide Email Me | My Blog | My Forum   Sign up for more free newsletters on your favorite topics You are receiving this newsletter because you subscribed to the About.com Animals newsletter. If you wish to change your email address or unsubscribe, please click here. About.com respects your privacy: Our Privacy Policy Contact Information: 1500 Broadway, 6th Floor New York, NY, 10036 © 2012 About.com   Must Reads Animals A to Z What is Evolution? Basic Animal Groups Facts About Animals Animal Characteristics   Follow me on: Advertisement