Tui De Roy / Wolf giant tortoise (Chelonoidis becki) in habitat. Hybrids of mixed parentage with different shell shapes are scattered far and wide on the rugged west slope of Wolf Volcano. Wolf Volcano, Isabela Is...

John Shaw / Hybrid Poplar tree plantation in autumn (Populs sp.). Boardman Tree Farm, near Irrigon, Oregon, USA. October.

John Waters / Large group of Pied wagtails (Motacilla alba) roosting in a Plane tree (Platanus hispanica), Bath, England, UK, January.

Tui De Roy / Floreana giant tortoise hybrid descendants (Chelonoidis elephantopus) feeding on flower. These are descendants of the extinct Floreana giant tortoise, but are hybridised with other species. Fausto Lle...

Alex Mustard / Black hamlet (Hypoplectrus nigricans) and Yellowbelly hamlet (Hypoplectrus aberrans) spawning at dusk. As this genus is quite recently evolved hybridization is still possible. Hamlets are one of the...

MYN / Paul Harcourt Davies / Ophrys orchid (Ophrys x maremmae) a natural hybrid between (Ophrys fuciflora) and Ophrys tenthredinifera) occasionally found where both species are present together, Umbria, Italy, May. focus-stack-c...

Nick Garbutt / Large aerial pitchers of natural hybrid Pitcher Plant (Nepenthes stenophylla x Nepenthes veitchi). Montane mossy heath forest or 'kerangas', southern plateau, Maliau Basin, Sabah's 'Lost World', Borne...

Ernie Janes / Domestic pig, hybrid large white sow in free-range conditions, UK, September 2010

Ernie Janes / Domestic pig, hybrid large white sow in free-range sty, UK, August 2010

Ernie Janes / RF- Domestic pig, hybrid large white sow and piglets in sty, UK, September 2010. (This image may be licensed either as rights managed or royalty free.)

Ernie Janes / Domestic pig, hybrid large white sow and piglets in sty, UK, September 2010

Wild Wonders of Europe / della Ferrera / Common european frogs (Pelophylax kl. esculentus) the hybrid of the Pool frog (Pelophylax lessonae) and the Marsh frog (Pelophylax ridibundus) on tree trunk submersed in water, near Mužilovcica villag...

Juan Manuel Borrero / Mule - offspring of male donkey and female horse - Spain

Thomas Marent / Sykes Monkey (Cercopithecus albogularis) and Red-tail Monkey (Cercopithecus ascanius) hybrid, Mount Kenya Wildlife Conservancy, Kenya

Paul Harcourt Davies / Vanilla orchid (Gymnadenia x heufleri) hybrid in alpine meadow, found where parents Short-spurred fragrant orchid (Gymnadenia odoratissima) and Black vanilla orchid (Gymnadenia rhellicani) grow togeth...

Paul Harcourt Davies / Fragrant orchid (Gymnadenia conopsea), Small white orchid (Pseudorchis albida) and Vanilla orchid hybrid (Gymnadenia x suaveolens), a hybrid between Fragrant orchid and Black vanilla orchid (Gymnadeni...

Paul Harcourt Davies / Fragrant orchid (Gymnadenia conopsea), Small white orchid (Pseudorchis albida) and Vanilla orchid hybrid (Gymnadenia x suaveolens), a hybrid between Fragrant orchid and Black vanilla orchid (Gymnadeni...

Paul Harcourt Davies / Alpine meadow with Hybrid vanilla orchid (Gymnadenia x suaveolens), a hybrid between Fragrant orchid (Gymnadenia conopsea) and Black vanilla orchid (Gymnadenia rhellicani). Seiser Alm / Alpe di Siusi,...

Paul Harcourt Davies / Alpine meadow with Hybrid vanilla orchid (Gymnadenia x suaveolens), a hybrid between Fragrant orchid (Gymnadenia conopsea) and Black vanilla orchid (Gymnadenia rhellicani). Seiser Alm / Alpe di Siusi,...

Paul Harcourt Davies / Hybrid vanilla orchid (Gymnadenia x heufleri), hybrid between Short-spurred fragrant orchid (Gymnadenia odoratissima) and Dark vanilla orchid (Gymnadenia rhellicani). Seiser Alm / Alpe di Siusi, Dolom...

Paul Harcourt Davies / Hybrid vanilla orchid (Gymnadenia x heufleri), hybrid between Short-spurred fragrant orchid (Gymnadenia odoratissima) and Dark vanilla orchid (Gymnadenia rhellicani). Seiser Alm / Alpe di Siusi, Dolom...

Lorraine Bennery / Natural hybrid between Yellow spider orchid (Ophrys lacaitae), and Orchid (Ophrys oxyrrhynchos), occasionally found where both species are present together, Sortino, Sicily, April.

Lorraine Bennery / A natural hybrid between (Anacamptis picta var. caucasica) and (Anacamptis papillionacea var. aegea) occasionally found where both species are present together, Profitis Illias, Rhodes Island, Greece,...

Lorraine Bennery / A natural hybrid between Bumblebee orchid (Ophrys bombyliflora) and (Ophrys rhodia) occasionally found where both species are present together, Laerma, Rhodes Island, Greece, March.

Lorraine Bennery / Natural hybrid between (Dactylorhiza fuchsii) and (Dactylorhiza sambucina) occasionally found where both species are present together, Col de la Colombiere, Haute-Savoie, France, June.

Ingo Arndt / Common lime tree flowers (Tilia x europaea), Germany. June.

Ingo Arndt / Aerial photo of flowering European Lime trees (Tilia x europaea) which are an important food source for Honey bees (Apis mellifera), Germany. June.

Niall Benvie / Hybrid larch (Larix eurolepsis) cones, Montreathmont, Angus, Scotland

Mark Taylor / Persian-x-Ragdoll kitten, age 7 weeks, back view, looking over shoulder.

Mark Taylor / Siamese x Ragdoll kitten, age 7 weeks, walking across.

Nigel Cattlin / Triticale (variety Salvo) a hybrid crop of wheat and rye used for animal feed, healthy crop in leaf and green , Wiltshire, England, UK. July

Ernie Janes / London plane tree (Platanus x hispanicus) fruits in winter, Norfolk, England, UK. March.

Nigel Cattlin / Dog's-tooth violet or fawn lily (Erythronium 'Pagoda') pendulous yellow recurved flowers backlit by spring afternoon sunshine, April

David Pattyn / Wild Buffon's macaw x Scarlet macaw (Ara ambiguus x Ara macao) hybrid Heredia, Costa Rica

David Pattyn / Wild Buffon's macaw x Scarlet macaw (Ara ambiguus x Ara macao) hybrid Heredia, Costa Rica

David Pattyn / Wild Buffon's macaw x Scarlet macaw (Ara ambiguus x Ara macao), courtship, Heredia, Costa Rica

David Pattyn / Scarlet macaw (Ara macao) and hybrid macaws with Great Green Macaw (Ara ambigua) at a breeding centre being fed. These macaws are already released and fly free in the surrounding forest but once a day...

Doug Perrine / Hybrid Laysan albatross x Blackfooted albatross (Phoebastria immutabilis x nigripes) sky-pointing while courting Laysan albatross, within breeding colony. Sand Island, Midway Atoll National Wildlife R...

Tui De Roy / Photographer Tui De Roy harvesting naturalised hybrid tomatoes around the edges of her garden. Puerto Ayora, Santa Cruz Island, Galapagos. June 2020.

Tui De Roy / Floreana giant tortoise hybrid descendant (Chelonoidis elephantopus), Fausto Llerena Giant Trotoise Breeding Centre, Galapagos National park Directorate, Puerto Ayora, Santa Cruz Island, Galapagos.

Linda Pitkin / Hidcote comfrey (Symphytum officinale x asperum x grandiflorum = S. 'Hidcote Blue') Staffhurst Wood, Surrey, England, April.

Linda Pitkin / Bushy mint, a hybrid mint(Mentha arvensis x spicata = M. x gracilis) Brookwood Cemetery, Surrey, England, August.

Paul Harcourt Davies / Serapicamptis orchid, a natural hybrid (Serapicamptis tremezzinae) between the ploughshare orchid (Serapias vomeracea) and bug orchid (Anacamptis coriophora) Umbria, Italy, May.

Nick Upton / Forsythia bush (Forsythia x intermedia) flowering, Wiltshire garden, UK, March.

Nick Upton / Forsythia bush (Forsythia x intermedia) flowering, Wiltshire garden, UK, March.

Tui De Roy / Floreana giant tortoise (Chelonoidis elephantopus) hybrid descendant male and female hybrid at the Fausto Llerena Tortoise Breeding Centre for the purpose of repopulating Floreana Island. This species...

Tui De Roy / Rugged shores of Banks Bay, where whalers two centuries ago inadvertently let some Florenana and Pinta tortoises escape, which later bred with the local species. Wolf Volcano, Isabela Island, Galapago...

Tui De Roy / Steep, broken lava covered in dense, thorny vegetation on the western slope of Wolf Volcano, where hybrid descendants of Pinta and Floreana tortoises are mixed within the Wolf tortoise population. Wol...