Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19693
Western Grebes rushing across Lake Wohlford, exhibiting a spectacular courtship behavior in which the aquatic birds literally run across the surface of the water while their feet hit the water up to 20 times per second.
Species: Western Grebe, Aechmophorus occidentalis
Location: Lake Wohlford, Escondido, California
Image ID: 41537
Two Giant Black Sea Bass in a Courtship Posture, in Kelp at Catalina Island. In summer months, black seabass gather in kelp forests in California to form mating aggregations. Courtship behaviors include circling of pairs of giant sea bass, production of booming sounds by presumed males, and nudging of females by males in what is though to be an effort to encourage spawning.
Species: Giant black sea bass, Stereolepis gigas
Location: Catalina Island, California
Image ID: 39432
Mother and calf southern right whales are seen here as part of a larger courtship group, with adult males interested in mating with the mother. The calf has no choice but to stay by her mother's side during the courting activities.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38381
Western Grebes rushing across Lake Wohlford, exhibiting a spectacular courtship behavior in which the aquatic birds literally run across the surface of the water while their feet hit the water up to 20 times per second.
Species: Western Grebe, Aechmophorus occidentalis
Location: Lake Wohlford, Escondido, California
Image ID: 40840
Two Western Grebes in a Spectacular Rush Across the Surface of Lake Wohlford. Rushing is a courtship behavior among grebes and requires the aquatic birds to step as rapidly as 20 beats per second to walk across water in this way. Simply amazing.
Species: Western Grebe, Aechmophorus occidentalis
Location: Lake Wohlford, Escondido, California
Image ID: 40866
Two Western Grebes Rushing on Lake Wohlford near San Diego. Grebe rushing, a courtship behavior, happens when the birds slap the lake surface up to 20 times per second, literally running across the water.
Species: Western Grebe, Aechmophorus occidentalis
Location: Lake Wohlford, Escondido, California
Image ID: 41561
Adult male humpback whale singing, suspended motionless underwater. Only male humpbacks have been observed singing. All humpbacks in the North Pacific sing the same whale song each year, and the song changes slightly from one year to the next.
Species: Humpback whale, Megaptera novaeangliae
Location: Maui, Hawaii
Image ID: 02796
A brown pelican preening, reaching with its beak to the uropygial gland (preen gland) near the base of its tail. Preen oil from the uropygial gland is spread by the pelican's beak and back of its head to all other feathers on the pelican, helping to keep them water resistant and dry. Adult winter non-breeding plumage.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 30326
Male and female southern right whales mating underwater, Eubalaena australis. The male positions himself below the female and turns upside down, so the two whales are belly-to-belly and can mate. Sand has been stirred up by the courtship activities and the water is turbid.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38291
Courting pair of southern right whales underwater, Eubalaena australis. In this image, the male is below and inverted (belly up) and the female is at the surface. While the posture in this photo isn't quite mating, it is a courting behavior that often precedes mating.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38296
Clark's Grebes rushing side by side, a spectacular courtship behavior in which the aquatic birds literally run on the surface of the water while slapping their feet up to 20 times per second.
Species: Clark's Grebe, Aechmophorus clarkii
Location: Lake Wohlford, Escondido, California
Image ID: 40911
Clark's Grebes Dip Shaking, a courtship behavior in which the grebes face each other and alternate dipping their beaks in the water and shaking their head, tossing water into the air. Coupled with ratchet-pointing, several rounds of dip-shaking are often an immediate precursor to rushing.
Species: Clark's Grebe, Aechmophorus clarkii
Location: Lake Wohlford, Escondido, California
Image ID: 40888