Search results for Sexual Dimorphism Male - Fem...

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Dusk settles on downtown San Diego with snow-covered Mount Laguna in the distance
Dusk settles on downtown San Diego with snow-covered Mount Laguna in the distance.
Location: San Diego, California
Image ID: 26716  
Ancient Douglas fir trees in Cathedral Grove. Cathedral Grove is home to huge, ancient, old-growth Douglas fir trees. About 300 years ago a fire killed most of the trees in this grove, but a small number of trees survived and were the originators of what is now Cathedral Grove. Western redcedar trees grow in adundance in the understory below the taller Douglas fir trees, Pseudotsuga menziesii, MacMillan Provincial Park, Vancouver Island, British Columbia, Canada
Ancient Douglas fir trees in Cathedral Grove. Cathedral Grove is home to huge, ancient, old-growth Douglas fir trees. About 300 years ago a fire killed most of the trees in this grove, but a small number of trees survived and were the originators of what is now Cathedral Grove. Western redcedar trees grow in adundance in the understory below the taller Douglas fir trees.
Species: Douglas fir tree, Pseudotsuga menziesii
Location: Cathedral Grove, MacMillan Provincial Park, Vancouver Island, British Columbia, Canada
Image ID: 22456  
Panorama dimensions: 9702 x 3043
Adams River sockeye salmon. A female sockeye salmon swims upstream in the Adams River to spawn, having traveled hundreds of miles upstream from the ocean, Oncorhynchus nerka, Roderick Haig-Brown Provincial Park, British Columbia, Canada
Adams River sockeye salmon. A female sockeye salmon swims upstream in the Adams River to spawn, having traveled hundreds of miles upstream from the ocean.
Species: Sockeye salmon, Oncorhynchus nerka
Location: Adams River, Roderick Haig-Brown Provincial Park, British Columbia, Canada
Image ID: 26161  
The bright orange garibaldi fish, California's state marine fish, is also clownlike in appearance, Hypsypops rubicundus
The bright orange garibaldi fish, California's state marine fish, is also clownlike in appearance.
Species: Garibaldi, Hypsypops rubicundus
Location: California
Image ID: 02416  
The Second Wave at sunset. The Second Wave, a curiously-shaped sandstone swirl, takes on rich warm tones and dramatic shadowed textures at sunset. Set in the North Coyote Buttes of Arizona and Utah, the Second Wave is characterized by striations revealing layers of sedimentary deposits, a visible historical record depicting eons of submarine geology, Paria Canyon-Vermilion Cliffs Wilderness
The Second Wave at sunset. The Second Wave, a curiously-shaped sandstone swirl, takes on rich warm tones and dramatic shadowed textures at sunset. Set in the North Coyote Buttes of Arizona and Utah, the Second Wave is characterized by striations revealing layers of sedimentary deposits, a visible historical record depicting eons of submarine geology.
Location: North Coyote Buttes, Paria Canyon-Vermilion Cliffs Wilderness, Arizona
Image ID: 28614  
A beautiful golden-brown female California Sea Lion at the Coronado Islands, posing on a carpet of purple marine algae, Baja California, Mexico, Zalophus californianus, Coronado Islands (Islas Coronado)
A beautiful golden-brown female California Sea Lion at the Coronado Islands, posing on a carpet of purple marine algae, Baja California, Mexico.
Species: California sea lion, Zalophus californianus
Location: Coronado Islands (Islas Coronado), Baja California, Mexico
Image ID: 38559  
A perfect Brown Pelican Head Throw with Distant Ocean in Background, bending over backwards, stretching its neck and gular pouch, winter adult non-breeding plumage coloration, Pelecanus occidentalis, Pelecanus occidentalis californicus, La Jolla, California
A perfect Brown Pelican Head Throw with Distant Ocean in Background, bending over backwards, stretching its neck and gular pouch, winter adult non-breeding plumage coloration.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38935  
Double side-eye from two young California sea lions resting on a reef in La Jolla, Zalophus californianus
Double side-eye from two young California sea lions resting on a reef in La Jolla.
Species: California sea lion, Zalophus californianus
Location: La Jolla, California
Image ID: 34273  
Blue whale 80-feet long, full body photograph of an enormous blue whale showing rostrom head to fluke tail, taken at close range with very wide lens, Balaenoptera musculus, San Diego, California
Blue whale 80-feet long, full body photograph of an enormous blue whale showing rostrom head to fluke tail, taken at close range with very wide lens.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 27967  
North Peak (12,242') rises over lower Conness Lake, its water colored deep blue-green by glacier runoff. Mount Conness (12,589') towers in the upper left. Hoover Wilderness, Inyo National Forest, Conness Lakes Basin
North Peak (12,242') rises over lower Conness Lake, its water colored deep blue-green by glacier runoff. Mount Conness (12,589') towers in the upper left. Hoover Wilderness, Inyo National Forest.
Location: Conness Lakes Basin, Hoover Wilderness, California
Image ID: 36427  
Panorama dimensions: 7008 x 15585
Parasitic zoanthid anemones cover, encrust and overwhelm a golden gorgonian. The gorgonian on the left has been completely parasitized by zoanthid anemones, while the gorgonian to the right remains free of zoanthids (for now). A garibaldi swims below the two sea fans. The golden gorgonian is a filter-feeding temperate colonial species that lives on the rocky bottom at depths between 50 to 200 feet deep. Each individual polyp is a distinct animal, together they secrete calcium that forms the structure of the colony. Gorgonians are oriented at right angles to prevailing water currents to capture plankton drifting by, Muricea californica, Parazoanthus lucificum, Savalia lucifica, Macrocystis pyrifera, San Clemente Island
Parasitic zoanthid anemones cover, encrust and overwhelm a golden gorgonian. The gorgonian on the left has been completely parasitized by zoanthid anemones, while the gorgonian to the right remains free of zoanthids (for now). A garibaldi swims below the two sea fans. The golden gorgonian is a filter-feeding temperate colonial species that lives on the rocky bottom at depths between 50 to 200 feet deep. Each individual polyp is a distinct animal, together they secrete calcium that forms the structure of the colony. Gorgonians are oriented at right angles to prevailing water currents to capture plankton drifting by.
Species: California golden gorgonian, Luminescent parazoanthid, Zoanthid anemone, Giant kelp, Muricea californica, Parazoanthus lucificum, Savalia lucifica, Macrocystis pyrifera
Location: San Clemente Island, California
Image ID: 38493  
Red gorgonian on rocky reef, below kelp forest, underwater. The red gorgonian is a filter-feeding temperate colonial species that lives on the rocky bottom at depths between 50 to 200 feet deep. Gorgonians are typically oriented at right angles to prevailing water currents to capture plankton drifting by, Leptogorgia chilensis, Lophogorgia chilensis, San Clemente Island
Red gorgonian on rocky reef, below kelp forest, underwater. The red gorgonian is a filter-feeding temperate colonial species that lives on the rocky bottom at depths between 50 to 200 feet deep. Gorgonians are typically oriented at right angles to prevailing water currents to capture plankton drifting by.
Species: Red gorgonian, Leptogorgia chilensis, Lophogorgia chilensis
Location: San Clemente Island, California
Image ID: 38496  
Huge California Sea Lion Male Underwater, a bull, patrolling his breeding harem and territory, Coronado Islands, Mexico. His sagittal crest, the bony bump on his head that distinguishes adult male sea lions, is clearly seen. This particular sea lion bears an orange tag on his left foreflipper, probably as a result of rescue and release as a young sea lion years earlier, Zalophus californianus, Coronado Islands (Islas Coronado)
Huge California Sea Lion Male Underwater, a bull, patrolling his breeding harem and territory, Coronado Islands, Mexico. His sagittal crest, the bony bump on his head that distinguishes adult male sea lions, is clearly seen. This particular sea lion bears an orange tag on his left foreflipper, probably as a result of rescue and release as a young sea lion years earlier.
Species: California sea lion, Zalophus californianus
Location: Coronado Islands (Islas Coronado), Baja California, Mexico
Image ID: 38655  
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, Stereolepis gigas
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  
Mature adult male South American sea lion and juvenile, hauled out on rocks to rest and warm in the sun, Otaria flavescens, Patagonia, Argentina, Otaria flavescens, Puerto Piramides, Chubut
Mature adult male South American sea lion and juvenile, hauled out on rocks to rest and warm in the sun, Otaria flavescens, Patagonia, Argentina.
Species: South American Sea Lion, Otaria flavescens
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38363  
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, Eubalaena australis, Puerto Piramides, Chubut, Argentina
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  
A California Brown Pelican flying over the Pacific Ocean, spreads its large wings wide to slow down as it banks, turns in midair, to land on seacliffs in La Jolla. Winter adult non-breeding plumage, Pelecanus occidentalis californicus, Pelecanus occidentalis
A California Brown Pelican flying over the Pacific Ocean, spreads its large wings wide to slow down as it banks, turns in midair, to land on seacliffs in La Jolla. Winter adult non-breeding plumage.
Species: Brown Pelican, Pelecanus occidentalis californicus, Pelecanus occidentalis
Location: La Jolla, California
Image ID: 39791  
Two adult female California Sea Lions, Portrait, La Jolla, Zalophus californianus
Two adult female California Sea Lions, Portrait, La Jolla.
Species: California sea lion, Zalophus californianus
Location: La Jolla, California
Image ID: 36811  
Double-crested cormorant nuptial crests, tufts of feathers on each side of the head, plumage associated with courtship and mating, Phalacrocorax auritus, La Jolla, California
Double-crested cormorant nuptial crests, tufts of feathers on each side of the head, plumage associated with courtship and mating.
Species: Double-crested cormorant, Phalacrocorax auritus
Location: La Jolla, California
Image ID: 36845  
California brown pelican in flight, spreading wings wide to slow in anticipation of landing on seacliffs. Adult winter non-breeding plumage, Pelecanus occidentalis, Pelecanus occidentalis californicus
California brown pelican in flight, spreading wings wide to slow in anticipation of landing on seacliffs. Adult winter non-breeding plumage.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Image ID: 37408  
Northern cardinal, male, Cardinalis cardinalis, Amado, Arizona
Northern cardinal, male.
Species: Northern cardinal, Cardinalis cardinalis
Location: Amado, Arizona
Image ID: 22891  
Cholla cactus, brittlebush, ocotillo and various cacti and wildflowers color the sides of Glorietta Canyon. Heavy winter rains led to a historic springtime bloom in 2005, carpeting the entire desert in vegetation and color for months, Encelia farinosa, Fouquieria splendens, Opuntia, Anza-Borrego Desert State Park, Borrego Springs, California
Cholla cactus, brittlebush, ocotillo and various cacti and wildflowers color the sides of Glorietta Canyon. Heavy winter rains led to a historic springtime bloom in 2005, carpeting the entire desert in vegetation and color for months.
Species: Encelia farinosa, Fouquieria splendens, Opuntia
Location: Anza-Borrego Desert State Park, Borrego Springs, California
Image ID: 10975  
Bull elephant seal exits the water to retake his position on the beach. He shows considerable scarring on his chest and proboscis from many winters fighting other males for territory and rights to a harem of females. Sandy beach rookery, winter, Central California, Mirounga angustirostris, Piedras Blancas, San Simeon
Bull elephant seal exits the water to retake his position on the beach. He shows considerable scarring on his chest and proboscis from many winters fighting other males for territory and rights to a harem of females. Sandy beach rookery, winter, Central California.
Species: Elephant seal, Mirounga angustirostris
Location: Piedras Blancas, San Simeon, California
Image ID: 15458  
Magnificent frigatebird, adult male on nest, with throat pouch inflated, a courtship display to attract females, Fregata magnificens, North Seymour Island
Magnificent frigatebird, adult male on nest, with throat pouch inflated, a courtship display to attract females.
Species: Magnificent frigatebird, Fregata magnificens
Location: North Seymour Island, Galapagos Islands, Ecuador
Image ID: 16725  
Steller sea lions (Northern sea lions) gather on rocks. Steller sea lions are the largest members of the Otariid (eared seal) family. Males can weigh up to 2400 lb, females up to 770 lb, Eumetopias jubatus, Chiswell Islands, Kenai Fjords National Park, Alaska
Steller sea lions (Northern sea lions) gather on rocks. Steller sea lions are the largest members of the Otariid (eared seal) family. Males can weigh up to 2400 lb., females up to 770 lb.
Species: Steller sea lion, Eumetopias jubatus
Location: Chiswell Islands, Kenai Fjords National Park, Alaska
Image ID: 16977  
A great white shark swims underwater through the ocean at Guadalupe Island, Carcharodon carcharias, Guadalupe Island (Isla Guadalupe)
A great white shark swims underwater through the ocean at Guadalupe Island.
Species: Great white shark, Carcharodon carcharias
Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico
Image ID: 21348  
The Milky Way at Night over Sky Rock. Sky Rock petroglyphs near Bishop, California. Hidden atop an enormous boulder in the Volcanic Tablelands lies Sky Rock, a set of petroglyphs that face the sky. These superb examples of native American petroglyph artwork are thought to be Paiute in origin, but little is known about them
The Milky Way at Night over Sky Rock. Sky Rock petroglyphs near Bishop, California. Hidden atop an enormous boulder in the Volcanic Tablelands lies Sky Rock, a set of petroglyphs that face the sky. These superb examples of native American petroglyph artwork are thought to be Paiute in origin, but little is known about them.
Location: Bishop, California
Image ID: 28817  
Panorama dimensions: 13870 x 16600
Sunrise over The Mount Soledad Cross, a landmark in La Jolla, California. The Mount Soledad Cross is a 29-foot-tall cross erected in 1954. Aerial photo
Sunrise over The Mount Soledad Cross, a landmark in La Jolla, California. The Mount Soledad Cross is a 29-foot-tall cross erected in 1954. Aerial photo.
Location: La Jolla, California
Image ID: 38096  
Brown Pelicans on Goldfish Point in La Jolla, time exposure blurs the large waves, aerial photograph. In the summer we used to jump off the cliff (the "Clam") in front of the twin cave entrances seen at middle-right, Pelecanus occidentalis, Pelecanus occidentalis californicus
Brown Pelicans on Goldfish Point in La Jolla, time exposure blurs the large waves, aerial photograph. In the summer we used to jump off the cliff (the "Clam") in front of the twin cave entrances seen at middle-right.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38865  
The leafy seadragon (Phycodurus eques) is found on the southern and western coasts of Australia. Its extravagent appendages serve only for camoflage, since it has a nearly-invisible dorsal fin that propels it slowly through the water. The leafy sea dragon is the marine emblem of South Australia, Phycodurus eques, Rapid Bay Jetty
The leafy seadragon (Phycodurus eques) is found on the southern and western coasts of Australia. Its extravagent appendages serve only for camoflage, since it has a nearly-invisible dorsal fin that propels it slowly through the water. The leafy sea dragon is the marine emblem of South Australia.
Species: Leafy seadragon, Phycodurus eques
Location: Rapid Bay Jetty, South Australia
Image ID: 39137  
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