Animals
- Animals
Hyena androgens exact high cost
Blocking androgens for spotted hyenas before they're born shows that the exposure of a female fetus to male hormones normally takes a heavy physical toll when females bear their own pups.
- Animals
Deer littermates have different dads
Twin fawns may not have the same dad—the first time multiple paternity has turned up in a large, free-ranging hoofed mammal.
- Animals
Dragonfly Glitter
Dragonflies bring a lot of glitter to glamour shots. Texas A&M’s entomology program offers a variety of stunning images to illustrate the considerable diversity of dragonfly species. A video captures a female laying eggs, and a sequence of images shows how junior grows up. Go to: http://stephenville.tamu.edu/~fmitchel/dragonfly/index.html
- Animals
Redder is healthier in squawking birds
When barn swallow nestlings open wide for food, their parents may be looking for the healthiest throats.
- Animals
Why don’t racing horses fry their brains?
Lumpy sacs bulging out of a horse's auditory tubes may solve the mystery of how such an athletic animal keeps its brain from overheating during exercise.
- Animals
Altruistic Sperm: Mouse gametes team up to power one winner
The sperm of wood mice hook together by the thousands to form high-speed teams racing toward an egg, even though only one of the pack will get the prize.
- Animals
Pesticides Mess with Immunity: Double whammy promotes frog deformities
Agricultural pollutants may conspire with parasites to cause the epidemic of limb deformity that's sweeping through North America's frog populations.
- Animals
Wasp Painting: Do insects know each other’s faces?
A researcher who dabbed tiny stripes on the faces and abdomens of paper wasps says that she's found the first evidence that the insects can recognize individuals by their markings.
- Animals
Butterfly ears suggest a bat influence
Researchers have found the first bat-detecting ear in a butterfly and suggest that the threat of bats triggered the evolution of some moths into butterflies.
- Animals
Oops. Woodpecker raps were actually gunshots
The knock-knock noises recorded last winter that raised hopes for rediscovering the long-lost ivory-billed woodpecker in Louisiana turn out to have been gunshots instead of bird noises.
- Animals
Who’s on first with hummingbird bills
A survey of 166 hummingbird species links sex differences in bill length to sex differences in plumage and to breeding behavior.
- Animals
Marine Mules: Near-sterile hyrids boost coral diversity
Reef corals that spawn in great mixed-up soups of many species may be maintaining their diversity because their hybrids are sterile mules.
