Mating pair of southern right whales underwater (on left). The gray adult whale on the right was formerly a white calf and, while it is not longer white, will remain lighter than normal throughout its life, Eubalaena australis, Argentina.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 35923
Courting pair of southern right whales underwater, Eubalaena australis. While the posture in this photo isn't quite mating, it is a courting behavior that often precedes mating. The male is below, upside down and trying to access the female belly-to-belly. However, the female does not want to mate, so she has positioned herself upside down at the surface so that the males in the courting group cannot reach her genital slit.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38446
Three Giant Black Sea Bass in a Courtship Posture, Hovering One Above the Other 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: 39434
A male giant sea bass nudges a female giant sea bass to encourage spawning as they swim in a tight circle. This courting pair of giant sea bass is deep in the kelp forest at Catalina Island. In summer months, giant sea bass gather in kelp forests in California to form courtship and mating aggregations, eventually leading to spawning.
Species: Giant black sea bass, Stereolepis gigas
Location: Catalina Island, California
Image ID: 39435
Three giant black sea bass, gathering in a mating/courtship aggregation amid kelp forest 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: 33355
Courting group of southern right whales, aerial photo. Mating may occur as a result of this courting and social behavior. The white whale seen here is a serious player named El Copulador (the copulator) and is often seen in mating and courting groups of southern right whales at Peninsula Valdes. His light coloration is an indication that he was a white calf, but he did not darken as he aged in the way most white southern right whale calves do.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38357
Aerial photo of Eight Southern Right Whales in a large Courtship / Mating Group at Peninsula Valdes, Argentina. Eubalaena australis. By permission of the Government of Argentina, Chubut, permit # 51 / 2025-SsCyA.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 41187
Mated pair of Brandt's Cormorants tend to the nest they have built on sea cliffs. Note the colors they assume during mating season: striking blue gular pouch (throat) along with faint blue-green iridescence in their plumage.
Species: Brandt's cormorant, Phalacrocorax penicillatus
Location: La Jolla, California
Image ID: 40130
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: 40842
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: 40867
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: 41538
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: 41541
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: 41562
Western Grebes rushing in a courtship display. Rushing grebes run across the water 60 feet (20m) or further with their feet hitting the water as rapidly as 20 times per second. Lake Hodges, San Diego.
Species: Western grebe, Aechmophorus occidentalis
Image ID: 36887
California Brown Pelican claps its jaws, sometimes rapidly several times, perhaps to dislodge debris or simply because its fun and feels good. This is not the same as the "yawn" that precedes a head throw. Adult winter breeding plumage with brown hind-neck.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38590
Adult California brown pelican in transition from non-breeding to breeding winter plumage. Note the brown hind neck of a breeding brown pelican is just filling in. This pelican already displays the red and olive throat and white and yellow head feathers of an adult winter brown pelican.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38679
California brown pelican orange morph, preening its feathers while on cliffs over the ocean. While this adult brown pelican exhibits the brown hind neck of a breeding adult, it displays an unusual orange throat rather than the more typical red.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38688
A brown pelican preening, uropygial gland (preen gland) visible 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. Note adult winter breeding plumage in display, with brown neck, red gular throat pouch and yellow and white head. This adult is just transitioning to the brown hind neck that characterizes breeding brown pelicans.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 36682
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.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 30289
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: Madison River, Yellowstone National Park, Wyoming
Image ID: 19697