Kim Taylor / Male hoverfly hovering above female {Eristalis sp.} on ragwort. England

Rod Williams / Tapered hoverfly (Eristalis pertinax) grooming Lewisham, London, England, May.

Rod Williams / Tapered hoverfly (Eristalis pertinax) Brockley cemetery, Lewisham, London, UK, April.

Pete Oxford / Brown-throated Parakeet (Aratinga pertinax), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Brown-throated Parakeet (Aratinga pertinax) on cactus, Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Brown-throated Parakeet (Aratinga pertinax), Bonaire, Netherlands Antilles, Caribbean

Premaphotos / Drone / Hover flies (Eristalis arbustorum) (left) and (Eristalis pertinax) (right) on a chrysanthemum Court Jesters flower in a garden, UK

Premaphotos / Yellow-footed drone fly, a hover fly (Eristalis pertinax) female on apple blossom, UK

Joel Sartore / Photo Ark / Brown-throated parakeet (Eupsittula pertinax) portrait, Pet Paradise, USA. Captive, occurs in Central and South America.

Joel Sartore / Photo Ark / Brown-throated parakeet (Eupsittula pertinax) portrait, Pet Paradise, USA. Captive, occurs in Central and South America.

Joel Sartore / Photo Ark / Brown-throated parakeet (Eupsittula pertinax) portrait, Pet Paradise, USA. Captive, occurs in Central and South America.

Joel Sartore / Photo Ark / Two Brown-throated conures (Eupsittula pertinax surinama) portrait, Piscilago Zoo, Colombia. Captive, occurs in South America.