Reproduction
This Bird Mimics an Entire Flock to Woo Females
When mating, male lyrebirds reproduce a cacophony of calls usually reserved for when predator is nearby
For Constipated Scorpions, Females Suffer Reproductively. Males, Not So Much.
After the arachnids drop their tails, poop backs up until it kills them, but before that it can affect pregnancy
Mice Sperm Sabotage Other Swimmers With Poison
A study in mice found that poison-spewing sperm make others swim in circles, but carry the antidote for themselves
3-D Reconstruction of Fossil Reveals Secret Sex Life of Dinosaurs
The newly discovered orifice is the oldest known fossilized cloacal vent in existence
Smithsonian's Giant Pandas Will Continue to Cavort for Three More Years
A new agreement ensures that the Zoo’s beloved animals and the new cub can stay through 2023
Nine of the Weirdest Penises in the Animal Kingdom
A short list of some of nature’s most curious phalluses, from the echidna’s four-headed unit to the dolphin’s prehensile member
Giant Panda Mama Gives Birth to Baby Cub at National Zoo
The pink, squeaking infant is about the size of a stick of butter and will be named in 100 days
This Frog Mates With Two Females in an Unusual Love Triangle
Relationships like these are rare among amphibians, scientists say
Anglerfish Drop Their Immune Defenses to Find Love
Male anglerfish are major clingers. To avoid mistaking mates as foreign tissue, the deep sea couples lost part of their immune system in evolution
Researchers Discover How Human Sperm Really Swim
A new 3-D microscopy study overturns hundreds of years of reproductive science
First Soft-Shelled Dinosaur Egg Fossils Found
Twin discoveries reveal that some ancient reptiles laid soft-shelled eggs, challenging long-held assumptions in paleontology
For Dogs, Puberty Is Pretty Ruff, Too
Like human teenagers, a new study shows that canines exhibit heightened conflict behavior during adolescence
Illusionist Frog Attracts Mates Without Unwanted Attention From Predators
The simultaneous mating calls of the male pug-nosed tree frog confuses bats but not female frogs
Dolphin Boy Bands Sing 'Pop' Songs in Sync—and the Ladies Want It That Way
Female dolphins, it seems, aren’t immune to the allure of a harmonizing boy band
Swamp Wallabies Can Get Pregnant While Pregnant
These marsupials can conceive during the final days of an ongoing pregnancy, creating a “backup” embryo ready to take its predecessor’s place
In a First, Cheetah Cubs Born Through Surrogacy at the Columbus Zoo
Zookeepers and Smithsonian scientists successfully transferred cheetah embryos, marking a major conservation milestone for the vulnerable species
Fourteen Fun Facts About Love and Sex in the Animal Kingdom
Out in the wild, flowers and candy just aren’t gonna cut it
Will Love Bloom Between Two Sloths at the National Zoo?
Keepers are gradually introducing Athena, who made her debut at the zoo in December, to fellow two-toed sloth Vlad. Sparks have not flown—yet
Birds Sniff Each Other's Bacteria to Help Choose a Mate
A new study finds the microbiome in a bird's preen oil determines its scent, which can impact its reproductive success
Will Microneedle Patches Be the Future of Birth Control?
Researchers are developing a new long-acting, self-administered device that delivers hormones beneath the skin’s surface
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