Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) feeding in cage at feeding bowls, Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Mark Carwardine / Mauritius / Mascarene / Echo parakeet (Psittacula eques) Threatened / endangered species, Mauritian Wildlife Foundation breeding centre, Mauritius, captive

Pete Oxford / Brown-throated Parakeet (Aratinga pertinax), Orinoco River, north of Puerto Ayacucho, Apure, Venezuela

Laurent Geslin / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) and Feral pigeon (Columba livia) on a feeder, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) and Feral pigeon (Columba livia) on a feeder, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) on a feeder, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) being fed in the hand, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) being fed in the hand, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) being fed in the hand by an elderly lady, in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) on a feeder in urban park, with young girl on bicycle behind, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) on a feeder in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeets (Psittacula krameri) on a feeder in urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) and Feral pigeons (Columba livia) on a feeder, in urban garden, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) feeding on fallen apple impaled on a branch, urban park, London, England, UK, November.

Laurent Geslin / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) feeding on fallen apple impaled on a branch, urban park, London, England, UK, November.

Wild Wonders of Europe / Geslin / Monk parakeet (Myiopsitta monachus) pair perched in tree in the Vatican garden, Rome, Italy, March 2010

Murray Cooper / Mitred Parakeet (Aratinga mitrata) flock on cliff, Peru

Murray Cooper / Santa Marta Parakeet (Pyrrhura viridicata) on lichen-covered snag, Colombia

Murray Cooper / Santa Marta Parakeet (Pyrrhura viridicata) scratching itself, Colombia

Murray Cooper / Santa Marta Parakeet (Pyrrhura viridicata) pair feeding on fruit, Colombia

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii), Ecuador

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii) pair, Ecuador

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii) pair emerging from nest cavity, Ecuador

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii), Ecuador

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii) emerging from nest cavity, Ecuador

Murray Cooper / Golden-plumed Parakeet (Leptosittaca branickii) pair at nest cavity, Ecuador

Dietmar Nill / Rose ringed / Ring-necked parakeet (Psittacula krameri) at nest hole in Plane tree in city, Mannheim, Germany, invasive alien species

Dietmar Nill / Rose ringed / Ringnecked parakeet (Psittacula krameri) in flight, Mannheim, Germany, invasive alien species

Dietmar Nill / Rose ringed / Ringnecked parakeet (Psittacula krameri) pair perched in tree, interacting, Mannheim, Germany, invasive alien species

Dietmar Nill / Rose ringed / Ringnecked parakeet (Psittacula krameri) flying from nest hole in tree, Mannheim, Germany, invasive alien species

Dietmar Nill / Rose ringed / Ringnecked parakeet (Psittacula krameri) pair at nest hole, Mannheim, Germany, invasive alien species

Konrad Wothe / Chestnut-fronted Macaw (Ara severa) and Dusky-headed Parakeet (Aratinga weddellii) flock at clay lick, Tambopata National Reserve, Peru

Luiz Claudio Marigo / Painted parakeet (Pyrrhura perlata / rhodogaster) perched in Amazon Rainforest on the shores of Cristalino River, Alta Floresta, Mato Grosso State, Brazil

Luiz Claudio Marigo / Grey-breasted parakeets (Pyrrhura griseipectus), endemic and endangered species in the forest of Sierra of Baturita, Ceara¡ State, Northeastern Brazil.

Andrew Walmsley / Yellow-crowned parakeet / Kakariki (Cyanoramphus auriceps) perched, captive, Orana Wildlife Park, Christchurch, New Zealand, June

Roy Mangersnes / Monk Parakeet (Myiopsitta monachus) feeding in tree, Buenos Aires, Argentina, South America. November.

Hanne & Jens Eriksen / Alexandrine parrot / parakeet {Psittacula eupatria}, feeding on fruit in tree, UAE

Hanne & Jens Eriksen / Alexandrine parakeet {Psittacula eupatria} feeding in flowering tree, UAE

Hanne & Jens Eriksen / Alexandrine parakeet {Psittacula eupatria} feeding in flowering tree, UAE

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) in Southern Beech (Nothofagus sp) forest, Ushuaia, Tierra del Fuego, Argentina

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) investigating potential nest cavity in Southern Beech (Nothofagus sp) forest, Ushuaia, Tierra del Fuego, Argentina

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) feeding in Southern Beech (Nothofagus sp) forest canopy, Ushuaia, Tierra del Fuego, Argentina

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) foraging in Southern Beech (Nothofagus sp) forest understory, Ushuaia, Tierra del Fuego, Argentina

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) courting pair in Southern Beech (Nothofagus sp) forest, Ushuaia, Tierra del Fuego, Argentina

Tui De Roy / Austral Parakeet (Enicognathus ferrugineus) feeding in Southern Beech (Nothofagus sp) forest canopy, Ushuaia, Tierra del Fuego, Argentina

David Welling / Green parakeet (Aratinga holochlora) perched on branch, Qiuta Mazatlan, McAllen, Texas, USA

LYNN M. STONE / Patagonian conure / Burrowing parakeet {Cyanoliseus patagonus} captive

Suzi Eszterhas / Yellow-chevroned Parakeet (Brotogeris chiriri) feeding, Pantanal, Brazil

Suzi Eszterhas / Yellow-chevroned Parakeet (Brotogeris chiriri), Pantanal, Brazil

Suzi Eszterhas / Yellow-chevroned Parakeet (Brotogeris chiriri), Pantanal, Brazil

Oriol Alamany / Parakeet auklet (Aethia psittacula) on rock, Saint George Island, Pribilof Islands, Alaska, USA

Oriol Alamany / Three Parakeet auklets (Aethia psittacula) on rocks, Saint Paul Island, Pribilof Islands, Alaska, USA

LYNN M. STONE / Sun conure / parakeet {Aratinga solstitialis} captive, Endangered, from Brazil and Guyana

Steven David Miller / Sun conure / parakeet {Aratinga solstitialis} hand-reared chick for sale in Florida, USA, captive. Endangered

Albert Lleal / Monk Parakeet (Myiopsitta monachus) feather, Argentina

Matthias Breiter / Parakeet Auklet (Cyclorrhynchus psittacula) pair on cliff, Pribilof Islands, Alaska

Matthias Breiter / Parakeet Auklet (Cyclorrhynchus psittacula) pair on cliff, Pribilof Islands, Alaska

Konrad Wothe / Rose-ringed Parakeet (Psittacula krameri) pair, south India

Konrad Wothe / Rose-ringed Parakeet (Psittacula krameri) male, south India

Konrad Wothe / Moustached Parakeet (Psittacula alexandri), India

Konrad Wothe / Alexandrine Parakeet (Psittacula eupatria), India

Juan Carlos Munoz / Monk parakeet (Myiopsitta monachus) perched, Pantanal NP, Mato Grosso, Brazil

Juan Carlos Munoz / Monk parakeet (Myiopsitta monachus) pair perched, Pantanal NP, Mato Grosso, Brazil

Juan Carlos Munoz / Monk parakeet (Myiopsitta monachus) perched, Pantanal NP, Mato Grosso, Brazil

Juan Carlos Munoz / Monk parakeet (Myiopsitta monachus) perched, Pantanal NP, Mato Grosso, Brazil

Juan Carlos Munoz / Monk parakeet (Myiopsitta monachus) perched, Pantanal NP, Mato Grosso, Brazil

Luiz Claudio Marigo / Reddish-bellied Parakeet (Pyrrhura frontalis) feeding on Hibiscus leaves in Serrinha do Alambari Environmental Protection Area, municipality of Resende, Rio de Janeiro State, Southeastern Brazil.

Luiz Claudio Marigo / Luchsi´s Monk Parakeet (Myiopsitta luchsi) at the Perereta cliffs, Cochabamba Department, Bolivia.

Luiz Claudio Marigo / Peach-fronted parakeet (Aratinga aurea) feeding on flowers. Chapada dos Veadeiros, Cerrado region of Gois State, Central Brazil.

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) pair in tree, wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose ringed / Ring-necked Parakeet (Psittacula krameri) feeding on flowers of Japanese Cherry (Prunus serrulata) Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) feeding on spring flowers / catkins, wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) male and female at nest hole in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) male feeding female in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) at nest hole in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) at nest hole in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose ringed / Ring-necked Parakeet (Psittacula krameri) feeding on flowers of Japanese Cherry (Prunus serrulata) Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) looking out of nest hole in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose-ringed / Ring-necked Parakeet (Psittacula krameri) flying to nest hole in Plane tree (Platanus sp) wild, Mannheim, Baden-Wuerttemberg, Germany

Kerstin Hinze / Rose ringed / Ring-necked Parakeet (Psittacula krameri) at its nest hole in a Plane tree (Platanus sp) Mannheim, Baden-Wuerttemberg, Germany

TJ Rich / Ring-necked / Rose-ringed Parakeet (Psittacula krameri) perched on branch outside nesting hole, Ranthambhore NP, Rajasthan, India

TJ Rich / Rose ringed / Ring-necked Parakeet {Psittacula krameri} perched with one foot raised, Ranthambhore NP, Rajasthan, India

TJ Rich / Rose ringed / Ring-necked Parakeet {Psittacula krameri} stretching wing, Ranthambhore NP, Rajasthan, India

TJ Rich / Rose ringed / Ring-necked Parakeet {Psittacula krameri} perched, Ranthambhore NP, Rajasthan, India

TJ Rich / Ring-necked / Rose-ringed Parakeet (Psittacula krameri) peeping out of nesting hole in tree, Ranthambhore NP, Rajasthan, India

Ingo Arndt / Parakeet Auklet (Cyclorrhynchus psittacula) group on rock, Round Island, Alaska

Jouan & Rius / Green parakeet (Aratinga holochlora) Costa Rica

Tui De Roy / Red-fronted Parakeet (Cyanoramphus novaezelandiae) eating, Enderby Island, Auckland Islands, sub-Antarctic New Zealand

Rob Brown / Red-fronted Parakeet (Cyanoramphus novaezelandiae) portrait, Enderby Island, New Zealand

Theo Allofs / Sun Parakeet (Aratinga solstitialis), native to South America

Rod Williams / Yellow crowned / fronted parakeet {Cyanoramphus auriceps}, from Stewart Is, New Zealand

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) hanging upside down feeding on hawthorn leaves, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.

David Kjaer / Rose-Ringed Parakeet (Psittacula krameri) at nest hole in tree, Richmond Park, London, UK, naturalised british population from cage birds that escaped into the wild.