1. Animals

    Risk of egg diseases may rush incubation

    Bird eggs can catch infections through their shells, and that risk may be an overlooked factor in the puzzlingly early start of incubation.

  2. Animals

    Skin Chemistry: Poison frogs upgrade toxins from prey

    For the first time, scientists have found a poisonous frog that takes up a toxin from its prey and then tweaks the chemical to make it a more deadly weapon.

  3. Animals

    To Bee He or She: Honeybees use novel sex-setting switch

    After more than a decade of work, an international team has found the main gene that separates the girls from the boys among honeybees.

  4. Animals

    Snapping shrimp whip up a riot of bubbles

    High-speed video and fancy math demonstrate that snapping shrimp make so much noise by popping bubbles.

  5. Animals

    Musical Pairs: Egg-deploying bird species divide for a song

    A new genetic analysis bolsters the idea that musical taste, rather than geography, split Africa's indigobirds into multiple species.

  6. Animals

    Sexual conflict pushes species making

    A novel comparison of 25 pairs of insect lineages finds that sexual conflict plays more of a role in making new species than scientists had realized.

  7. Animals

    Why do two-sex geckos triumph?

    Just the smell of an invasive species of gecko suppresses egg laying and subdues aggression in a resident.

  8. Animals

    Maybe what Polly wants is a new toy

    Changing the toys in a parrot's cage may ease the bird's tendency to fear new things.

  9. Animals

    Some female birds prefer losers

    When a female Japanese quail watches two males clash, she tends to prefer the loser.

  10. Animals

    The secret appetite of cleaner wrasses

    The little reef fish that nibble parasites off bigger fish that stop by for service actually prefer to nibble the customers.

  11. Animals

    City Song: Birds sing higher near urban traffic

    Birds in noisier city spots tend to sing at a higher pitch than do members of the same species in quieter neighborhoods.

  12. Animals

    Killer sex, literally

    Videotapes of yellow garden spiders show that if a female doesn't murder her mate, he'll expire during sex anyway.