Paul Allen's flower fly (Eristalis alleni) is a flower fly

Hoverfly

Hoverflies, sometimes called flower flies or syrphid flies, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae eat a wide range of foods...

 found only in Costa Rican forest in the central highlands. It was named after Paul Allen

Paul Allen

Paul Gardner Allen is an American business magnate, investor, and philanthropist. Allen co-founded Microsoft with Bill Gates...

. Another fly was also named after Allen's associate Bill Gates

Bill Gates

William Henry "Bill" Gates III is an American business magnate, investor, philanthropist, and author. Gates is the former CEO and current chairman of Microsoft, the software company he founded with Paul Allen...

, Bill Gates' flower fly

Bill Gates' flower fly

Bill Gates' flower fly is a flower fly found only in Costa Rican high montane cloud forests and named after Bill Gates...

 (Eristalis gatesi).

Its is similar in appearance to Eristalis circe Williston, 1891 and Eristalis persa Williston, 1891, but has different leg colouration.

Biology

Little is know of its biology, but most adults are found in association with flowers in the genus Senecio

Senecio

Senecio is a genus of the daisy family that includes ragworts and groundsels. The flower heads are normally rayed, completely yellow, and the heads are borne in branched clusters...

.