Peck’s skipper

not listed

N5 - Secure

S5 - Secure

not listed

Peck’s skipper is a small to medium-sized, very common, grass skipper. It is 1″ to 1¼″ in length and has a wingspan of ¾″ to 1¼″. Females are slightly larger than males.

The wings are proportionately short and broadly triangular. The hindwing is distinctly rounded. The upperside of the hindwing is brown with a large, central, orange patch. The patch is broken by dark veins and appears as four or five postmedian spots. The underside is brown with a band of large orange spots at the base and a band of six large orange spots near the middle of the wing. The third spot from the outer margin is distinctly longer than the rest. This character is sometimes referred to with the mnemonic “Peck’s is a Pointer”, and can also be seen on the upperside. The basal and median spots are usually separated by dark veins. Occasionally, the bands run together and the veins between the spots are the same color as the spots. On these individuals, the wing underside appears mostly orange.

The upperside of the forewing is brown with an irregular row of orange rectangular spots: three small spots near the margin in the in the postmedial area, then two smaller spots in the subapical area, then three larger spots extending to the inner margin in the medial area. On the male, there is also a prominent, black, sinuous stigma, and an orange area between the stigma and the leading edge of the wing (costal margin). The underside is similarly colored. The female is darker and lacks the stigma.

The antennae are short and faintly striped. Each antenna has a black swelling (club) at the tip, and a pale, thin, hooked extension (apiculus) at the end of the club.

The caterpillar is about ¾″ long and dirty brown with tiny pale spots. The thorax and abdomen are densely covered with moderately short hairs and have a dark stripe running down the middle. The breathing pore (spiracle) on the eighth abdominal segment is conspicuously enlarged. The head is very dark with a pair of indistinct white lines down the middle, and a short white bar between the eyes and between the mandibles. Behind the head there is a distinct black collar with a white front (anterior) margin. The preceding description could easily be made for all other Polites caterpillars. Long dash (P. mystic) has somewhat shorter hairs, crossline skipper (P. origenes) has very short hairs, and tawny-edged skipper (P. themistocles) has hairs so short that the caterpillar may appear glossy. Identification is best made by rearing them into adults.

Mature caterpillars are seen from early spring to late fall.

Total length: 1″ to 1¼″

Wingspan: ¾″ to 1¼″

Long dash (Polites mystic) wing undersides are orangish-brown and less contrasting. The hindwing underside lacks the conspicuously long median spot. The orange spots on the upperside appear as more of a band than a “patch”.

Tawny-edged skipper (Polites themistocles) wings are darker. The hindwing lacks the orange patch.

Meadows, forest clearings, marshes, pastures, old fields, powerline right-of-ways, suburbs, and other open grassy areas near wetland edges.

Probably two broods in Minnesota: Late May through June and mid-August to late September

Like all skippers, they have a rapid, darting flight. They tend to stay close to the ground.

Males perch on low vegetation throughout the day waiting for passing females. The female lays pale green eggs singly on the foliage of host plants. Larvae make a shelter by rolling one leaf or tying adjacent leaves together with silk. They live in their shelters, exiting only at night to feed. Second brood larvae overwinter in their shelters as third, fourth, or fifth instar caterpillars and pupate in their shelters in the spring.

Rice cutgrass, and probably bluegrass, brome, and other grasses.

Flower nectar from a wide variety of species

Sources

21, 24, 27, 29, 30, 75.

Very common

This could be usefully added to the current pix as it shows the wing underside, unlike the present 2 pix.

This pic was taken ... at the top of Barn Bluff (Red Wing). It illustrates some of the problems of identification for skippers.

Took it in my back yard St Louis Park, MN today. Looks like it has double wings!

Location: Woodbury, Minnesota

Location: Lebanon Hills Regional Park in Eagan

This could be usefully added to the current pix as it shows the wing underside, unlike the present 2 pix.

Location: St. Louis Park, MN

Took it in my back yard St Louis Park, MN today. Looks like it has double wings!

Location: at the top of Barn Bluff (Red Wing)

It illustrates some of the problems of identification for skippers. The season of the year is about right for Pecks.