Solvin Zankl / Male Long-tailed / Tisza mayfly (Palingania longicauda) concludes its last moult. By starting to fly hard towards the river the mayfly pulls its long caudal tails out of the old skin which will be lef...

Pete Oxford / Osborne's Lancehead (Bothrops osbornei) juvenile showing differently colored tail tip used for caudal luring, native to South America

Michael & Patricia Fogden / Desert Death Adder (Acanthophis pyrrhus) coiled in desert using tip of tail as a lure, an example of caudal luring, Australia

Tony Wu / Male Blue whale (Balaenoptera musculus) killed by collision with container ship. Large wound in the caudal region most likely the result of a direct strike from a large commercial vessel traveling in...

Tony Wu / Male Blue whale (Balaenoptera musculus) killed by collision with container ship. Large wound in the caudal region most likely the result of a direct strike from a large commercial vessel traveling in...

Brandon Cole / Whitetip reef sharks (Triaenodon obesus), caudal (tail) fins of many small sharks resting together. Baja, Mexico, Pacific Ocean.

Tony Wu / A male Humpback whale (Megaptera novaeangliae) calf playing at the ocean surface. The calf had just lifted its caudal region out of the water, then flipped over so that his belly was facing upward whi...

Tony Wu / A male Humpback whale calf (Megaptera novaeangliae) practicing how to make big splashes and loud sounds with his fluke and caudal region. Skills like this will become an important part of life for thi...

Michel Roggo / Tench (Tinca tinca), male, close to the nest with the female (see the caudal fin) with European white waterlily (Nymphaea alba) on the bed of Lake Morat, close to Faoug, Canton of Fribourg, Switzerlan...

Robert Valentic / Rugose death adder (Acanthophis rugosus) male using caudal luring to attract potential prey, at sunset, Boulia, Queensland, Australia, summer.

Tony Wu / Plastic garbage found in the gastrointestinal system of 10.6m female Sperm whale (Physeter macrocephalus) found off Jurong Island, Singapore in July 2015. This whale also had injuries in the caudal ar...

Tony Wu / Sperm whale (Physeter macrocephalus) skeleton of female dubbed Jubilee, on display at the Lee Kong Chian Natural History Museum in Singapore. This 10.6m adult whale was found off Jurong Island in July...

Tony Wu / Dead Blue whale (Balaenoptera musculus), floating in the Indian Ocean south of Sri Lanka. The cause of death was most likely a ship strike, with a large vessel colliding with the caudal region of the...

Tony Wu / Dead Blue whale (Balaenoptera musculus) most likely killed by a ship strike. There is a large wound in the animal's caudal area, suggesting a direct bow strike by a large vessel. Sri Lanka, Indian Oce...

Gabriel Rojo / RF- Two Orca whales (Orcinus orca) diving with caudal fins out of water. Punta Norte Natural Reserve, Peninsula Valdes, Chubut Province, Patagonia Argentina (This image may be licensed either as right...

Jan Hamrsky / Minnow mayfly nymph (Ephemeroptera, family Baetidae) abdomen and caudal filaments detail, Europe, May, controlled conditions

Jan Hamrsky / Broad-winged Damselfly / Beautiful Demoiselle larva (Calopteryx virgo), caudal gills detail. Czech Republic. Controlled conditions.

Doug Perrine / Porbeagle shark (Lamna nasus) captive, Nova Scotia, Canada, image digitally manipulated - note white patch on rear edge of dorsal fin and double keel on caudal (tail) fin that are diagnostic of this...

Robert Valentic / Death adder {Acanthophis antarcticus} close up of caudal lure on tail of female, Middleback ranges, South Australia

Robert Valentic / Rugose Death Adder (Acanthophis rugosus) male wriggling the tip of its tail (caudal lure) to mimic a grub or worm to attract a lizard within strike range, Darwin, Northern Territory, Australia

Robert Valentic / Barkly death adder {Acanthophis hawkei} female wriggling the tip of its tail (caudal lure) to mimic a grub or worm to attract a lizard within strike range, Northern Territory, Australia

Jeff Rotman / Caudal tail fin of Whitetip reef shark {Triaenodon obesus} hiding in cave, Red Sea, Egypt

Brandon Cole / DTail view of Whale shark just under surface with snorkelers {Rhincodon typus} Ningaloo Reef, Western Australia NOT FOR SALE IN USA

Duncan Mcewan / Large red damselfly larvae (Pyrrhosoma nymphula) showing caudal gills, August. Scotland, UK, Europe

Pete Oxford / Osborne's Lancehead (Bothrops osbornei) juvenile showing differently colored tail tip used for caudal luring, native to South America

Pete Oxford / Osborne's Lancehead (Bothrops osbornei) juvenile showing differently colored tail tip used for caudal luring, native to South America

Chien Lee / Schultz' Pit Viper (Trimeresurus schultzei) showing red tail tip used for caudal luring, Thumb Peak, Palawan Island, Philippines

Michael & Patricia Fogden / Death Adder (Acanthophis antarcticus) venomous snake uses tail to lure prey, an example of caudal luring, captive, Australia

Michael & Patricia Fogden / Desert Death Adder (Acanthophis pyrrhus) venomous snake uses tail to lure prey, an example of caudal luring, desert, central Australia

Michael & Patricia Fogden / Two-striped Forest Pit Viper (Bothrops bilineatus) coiled on rainforest floor using tip of tail as lure, an example of caudal luring, Amazon, Peru

Pete Oxford / Mangshanen Pit Viper (Trimeresurus mangshanensis) camouflaged on moss showing caudal luring behavior, native to China

Pete Oxford / Mangshanen Pit Viper (Trimeresurus mangshanensis) camouflaged on moss showing caudal luring behavior, native to China

Luciano Candisani / Black River Stingray (Potamotrygon motoro) venomous spine located in the base of the elongated caudal tail, Rio Negro, Pantanal, Brazil

James Christensen / Eyelash Viper (Bothriechis schlegelii) showing caudal luring behavior, western slope of the Andes Cloud Forest, Mindo, Ecuador

James Christensen / Eyelash Viper (Bothriechis schlegelii) showing caudal luring behavior, western slope of the Andes Cloud Forest, Mindo, Ecuador

Michael & Patricia Fogden / Desert Death Adder (Acanthophis pyrrhus) coiled in desert using tip of tail as a lure, an example of caudal luring, Australia