Wild Wonders of Europe / Radisics / African daisy (Arctotis hybrids) plant flowering on cliff top, Ponta de Sao Lourenco, Madeira, March 2009

Neil Lucas / Wistmans Wood, Devon, UK - ancient oak woodland (Quercus robur, Quercus petraea and hybrids)

Steven David Miller / Dingo (Canis lupus dingo) probably part domestic camp dog, running through campground, Kakadu National Park, Northern Territory, Australia, June

Nick Upton / Boy running with pet dog (Canis familiaris) a 'goldendoodle' golden retriever / standard Poodle cross. Hampshire, UK, October. Model released.

Michele Westmorland / Tan Hamlet, a hybrid of Yellowbelly and Shy hamlet(Hypoplectrus sp). St Vincent, West-Indies, Caribbean, May.

Fabrice Cahez / Wild boar / Domestic pig hybrid (Sus scrofa) running, Vosges, France, May

Robin Chittenden / Barnacle x Canada Goose hybrid (Branta leucopsis canadensis). Suffolk, UK, February.

Nick Upton / View of Lake Bohinj from the southern shore at Ribcev Laz with European chub / chubb (Squalius / Leuciscus cephalus) and Mallard duck (Anas platyrhynchos) family and Mallard hybrids swimming in the fo...

Alex Hyde / False oxlips (Primula vulgaris x veris), a hybrid of Cowslip and Common primrose, Peak District National Park, Derbyshire, April.

Alex Hyde / False oxlip (Primula vulgaris x veris), a hybrid of Cowslip and Common primrose, Peak District National Park, Derbyshire, April.

Juan Carlos Munoz / Tourist boat by icebergs in Jokulsarlon Lagoon, Vatnajokull Glacier, Iceland, July 2009

Juan Carlos Munoz / Amphibious tourist vehicle driving into the Jokulsarlon Lagoon, Vatnajokull Glacier, Iceland, July 2009

Bryan and Cherry Alexander / Dog handler with Domestic dog / Jackal cross, trained to detect explosives at Sheremetyevo Airport, Moscow, Russia, 2005.

Bryan and Cherry Alexander / Dog handler with Domestic dog / Jackal cross, trained to detect explosives at Sheremetyevo Airport, Moscow, Russia, 2005.

Bryan and Cherry Alexander / Dog handler with Domestic dog / Jackal cross, trained to detect explosives at Sheremetyevo Airport, Moscow, Russia, 2005.

Bryan and Cherry Alexander / Dog handler with domestic dog / Jackal cross, trained to detect explosives at Sheremetyevo Airport, Moscow, Russia, 2005.

Michel Poinsignon / Hybrid orchid, Fly orchid (Ophrys mouche) X Small spider orchid (Ophrys litigieux) in flower, Lorraine, France, April

Michel Poinsignon / Hydbrid orchid (Orchis militaris X Orchis purpurea) in flower, Lorraine, France, May

Jane Burton / Portrait of two young domestic Polecat-Ferrets (Mustela putorius furo) lying down together, aged 6 weeks.

Jane Burton / Portrait of two young domestic Polecat-Ferrets (Mustela putorius furo) lying down together, aged 6 weeks.

Neil Lucas / Ancient oak trees (Quercus robur, Quercus petraea and hybrids) covered in moss, with moss covered stones, Wistmans Wood, Devon, England UK

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) undergoing surgery to sterilize hybrids accidentally produced in captive breeding program to repopulate Pinta Island to restore its ecological balance, Cha...

Gary K. Smith / Rescued ex-battery domestic hens (hybrids), re-homed on rural allotment, enjoying free-range retirement, Norfolk, Uk, February

Peter Lewis / Hybrid of Lady orchid (Orchis purpurea) and Monkey orchid (Orchis simia) Hartslock, Oxfordshire, England, May

Peter Lewis / Hybrid of Lady Orchid (Orchis purpurea) and Monkey Orchid (Orchis simia) Hartslock, Oxfordshire, England

Peter Lewis / Hybrid of Lady Orchid (Orchis purpurea) and Monkey Orchid (Orchis simia) Hartslock, Oxfordshire, England

Peter Lewis / Purple variety of Green Winged Orchid (Orchis morio) Bishops Waltham, Hampshire, England, UK

Wild Wonders of Europe / Radisics / African daisy (Arctotis hybrids) plants flowering, Ponta de Sao Lourenco, Madeira, March 2009

Wild Wonders of Europe / Radisics / African daisy (Arctotis hybrids) plants flowering, Ponta de Sao Lourenco, Madeira, March 2009

Wild Wonders of Europe / Bartocha / Butterfly orchid x Green winged orchid (Orchis / Anacamptis papilionacea) x (Orchis / Anacamptis morio) flowers, Gargano National Park, Gargano Peninsula, Apulia, Italy

Wild Wonders of Europe / Bartocha / Butterfly orchid x Green winged orchid (Orchis / Anacamptis papilionacea) x (Orchis / Anacamptis morio) flowers, Gargano National Park, Gargano Peninsula, Apulia, Italy

Doug Perrine / Natural hybrid cross between Blue angelfish {Holacanthus bermudensis} and Queen angelfish {Holacanthus ciliaris} Texas, Gulf of Mexico, USA

John Cancalosi / Western grey kangaroos {Macropus fuliginosus} mating, South Australia Note - In captivity western males may produce hybrids from eastern females (never in reverse)

Neil Lucas / Wistmans Wood - ancient oak (Quercus robur, Quercus petraea and hybrids) wood with lichen. Devon, UK

Todd Pusser / Hybrid dolphin - Wholphin - False killer whale x Bottle nosed dolphin, Hawaii. {Pseudorca crassidens} x {Tursiops truncatus}

Juergen Freund / Sea snail shell specimen {Xenophora pallidula} Philippine

Pete Oxford / Tigon - hybrid tiger-lion: offspring of male tiger crossed with lioness 'Rangini', Calcutta Zoo, India. Crippled animal

Tony Phelps / Mountain Zebra Stallion/ horse hybrid. Overberg farmland, Western Cape, South Africa.

Todd Pusser / Hybrid dolphin - Wholphin - False killer whale x Bottle nosed dolphin, Hawaii. {Pseudorca crassidens} x {Tursiops truncatus}