On hot sunny days they are often found hanging out on the undersides of leaves, catching a good rest in the shade.They reach the male parts of the flowers, without touching the female parts of the flowers, thus no pollination. These butterflies are often referred to as ‘nectar-thieves’ as they do not pollinate after feeding on the nectar.Silver-spotted skipper butterflies almost never visit yellow flowers.When disturbed, the larvae regurgitate a pungent, green chemical to further deter predators.Silver spotted skipper larvae/caterpillars have an anal comb which helps them throw their excrement about 38 body lengths away from them, deterring predators from their shelters.Caterpillars have two big orange spots on their head that serve to scare away predators.Southern Canada, most of the continental states, and Northern Mexico.Large brownish head, with two prominent red-orange eyespots set at the front of the head capsule.Hind wings are short and rounded with a silver spot on the underside.Forewings have an orange band and are very pointed.Decrease in food-plant/host-plant density, warmer summers, which are hard on these delicate butterflies, urban development, wild-fires, and parasitism are some potential reasons. Read the Cool Facts below to read their defence mechanisms!Īlongside predation – increasing invasive insect species – there are a few potential causes for the silver spotted skipper butterfly to have been considered extirpated, and speculation as to why they have left the coast. Although the leaf shelter gives much camouflage, their scent is still distinguishable.
The larvae do have predators such as wasps and ants. Caterpillars over winter in their leaf shelters and pupate there, emerging as butterflies in the late spring. Silver-spotted skipper larvae only leave their leaf shelter at night, on cloudy days to feed, or to make a larger shelter.
They make four distinct types of leaf shelters during development and their shelter grows with them by adding more leaves. To make their shelters they bite the leaf margin, fold it over, and silk it together making for good protection. They live in leaf shelters that they make on or near their host plant. Silver-spotted skipper caterpillars have a unique body shape and colour. They live nearby or on host plants and this is where they lay their single egg. They typically are day-fliers and are not seen in groups. They can have one to two generations per summer and then they hibernate in the winter months in leaf shelters. The summer months are when they are active. They are the easiest to spot of the skippers and the largest of the skippers found in North America. When resting on a plant, they hang upside down on the leaf with their wings up, thus exposing the silver spots. They are brown in colour, with orange bands on their fore-wings, and silver spots on the underside of their hind-wings. They can be found and even heard skipping from one flower to the next. Although, they do not exclusively feed on legumes – they enjoy other plant nectars, insect frass (poop) and mud, assimilating nutrients from each. With a particular attraction to blue, purple, pink, red, and occasionally white flowers, it is no surprise that these butterflies love plants in the legume family. Silver-spotted skippers are small butterflies that frequent disturbed open woods, forest edges, and stream edges – essentially wherever nectar can be found.
#SILVER SPOTTED SKIPPER CATERPILLAR PATCH#
These butterflies have been extirpated from the B.C coast for over 50 years, but one was spotted fluttering by a patch of giant vetch on Cortes Island – read the story here! This observation changed the silver spotted skipper’s conservation status from extirpated to endangered. Species: Silver-spotted Skipper – Epargyreus clarus Silver-spotted Skipper – Epargyreus clarus
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