1. Animals

    Well-Tuned Bats: These animals are what they hear

    Two studies of bats find that neighbors can live in virtually different worlds because their echolocation calls are tuned to detect different prey.

  2. Animals

    Turtle Trekkers: Atlantic leatherbacks scatter widely

    Satellite monitoring of leatherback turtles in the Atlantic show that these animals range widely instead of sticking to "turtle corridors."

  3. Animals

    Red Sweat: Hippo skin oozes antibiotic sunscreen

    The hippo version of sweat, which is red-orange, contains pigments that can block microbial growth and some ultraviolet light.

  4. Animals

    Toxin Takeout: Frogs borrow poison for skin from ants

    Scientists have identified formicine ants as a food source from which poison frogs acquire their chemical weapons.

  5. Animals

    Din among the Orcas: Are whale watchers making too much noise?

    Whale-watching boats may be making so much noise that killer whales off the coast of Washington have to change their calls to communicate over the racket.

  6. Animals

    Shielded cells help fish ignore noise

    Fish can sort out the interesting ripples from the background rush of water currents through sensors shielded in canals that run along their flanks.

  7. Animals

    Male spiders amputate organs, run faster

    Tiny male spiders of a species common to the southeastern United States routinely remove one of their two oversize external sex organs, enabling them to run faster and longer.

  8. Animals

    Hooking the Gullible

    Research into fish behavior often reveals ways that bait designers can trick a fish into biting odd-looking lures, but angler appeal can also be an important marketing consideration.

  9. Animals

    Dull birds and bright ones beat so-so guys

    The plumage of yearling male lazuli buntings shows signs of a rare form of evolutionary pressure called disruptive selection.

  10. Animals

    Flex That Bill: Hummingbirds’ surprising insect-catching style

    High-speed videos of hummingbirds catching insects reveal that their lower bills are unexpectedly flexible.

  11. Animals

    Long Horns Win: Selection in action—Attacks favor spike length for lizards

    A hunting bird's quirk—a tendency to impale prey on thorns—leaves a record that has allowed scientists to catch a glimpse of an evolutionary force in action.

  12. Animals

    Wolf vs. Raven? Thieving birds may drive canines to form big packs

    A previously underappreciated reason why wolf packs get so big could be the relentless food snitching of ravens.