"From the age of six, everything I felt in connection with a rectangle of framed sunlight was dominated by a single passion. If my first glance of the morning was for the sun, my first thought was for the butterflies it would engender "

Nabokov was a keen lepidopterist and collector of butterflies from childhood, but it was not until he and Vera moved to the United States that his career as an entomologist began in earnest. At Harvard University, where he was a research fellow in zoology from 1942 to 1948, Nabokov was in charge of organising the butterfly collection at the Museum of Comparative Zoology. Later, the genus Nabokovia was named after him.