The meadows are notable for their large population of snake's head fritillaries. Despite modern conservation efforts, the number of small pearl-bordered fritillaries is still declining. Argynnini is a tribe of butterflies in the subfamily Heliconiinae, containing some of the fritillaries. Most fritillaries belong to the family Nymphalidae. The larval stages of gulf fritillaries include five instars, each with a varying timeframe. The 500,000 fritillaries which flower each year represent 80% of the British population. Like other fritillaries it is dependent on warm climates with violet rich flora. Fritillaries are commonly used as floral emblems. "Imperial Fritillaries in a Copper Vase" (F213) reflects the influences of Neo-Impressionist Paul Signac. In Florida, gulf fritillaries have two major flights during the year. Fritillaries in woodland habitats have been most severally affected by habitat loss. Gulf fritillaries are also commonly seen in local butterfly gardens across the U.S. Adult fritillaries do not have a very diverse set of plants from which they feed. Heath fritillaries typically fly close to the ground, with characteristic "flits" and glides.