Butterfly: Wingspan: 1 - 1½ inches (2.5 - 3.8 cm) UPPER SURFACE (dorsal) Male iridescent blue with black margins; black stigma on upper forewing edge. Female primarily black with blue patches on wing centers. UNDER SURFACE Gray/brown. Forewing with one white line. Hindwing with single blue spot below tail, red spot recessed inward; thin white line that forms an "M.” Single white dot near upper edge. Two tails of uneven length.
ID Tip: Thin white “M’ marking ventral hindwing. Dorsal wings iridescent blue.
Egg: Whitish; flattened disc. Laid singly on twigs and buds of host.
Caterpillar: Color variable: green; green and pinkish red; light red. Covered with minute whitish hairs. Head brown. Slug shaped.
Chrysalis: Brown with darker blotches on abdomen. Bean shaped. The overwintering stage.
White-M Hairstreaks look plain and brown when placidly nectaring, but when they fly, they deliver a flash of electric blue. Their upper wing surface is covered with light reflecting scales that create structural, metallic brilliance. These larger-than-average hairstreaks fly throughout much of the year but are rarely found in large numbers. Why this butterfly is so seldom seen is a mystery. Oaks, their caterpillar food source, are abundant in Alabama, and potential habitat is so extensive that intentional searches are difficult. White-M's are almost always found by accident. Perhaps they seem scarce because much of their time is spent high in the canopies of oak trees. When nearby spring-and-summer flowering trees are blossoming, White-Ms have little reason to descend to the ground. During late summer and fall, they are drawn to seasonal wildflowers and may be observed intently nectaring at goldenrods, snakeroots, and thoroughworts.
Females place eggs on twigs or buds of particular species of oaks, Caterpillars eat tender leaves, and their various color forms allow them to blend with young foliage that varies from soft green to red. Coffee brown chrysalides are formed in leaf litter at the tree's base. They are highly camouflaged within a rolled dead leaf. Three broods are produced during the year.
White M Hairstreaks range throughout the eastern United States, although they are based in the South. They probably occur throughout Alabama.
A dot on the county map indicates that there is at least one documented record of the species within that county. In some cases, a species may be common throughout the county, in others it may be found in only a specific habitat. The High Count information shows the highest numbers recorded for this species as well as when and where they occurred.
The sightings bar graphs depict the timing of flight(s) within each of three geographic regions. Place your cursor on a bar within the graph to see the number of individuals recorded during that period.
The abundance calendar displays the total number of individuals recorded within each week of the month. Both the graphs and the calendar are on based data collection that began in 2000.
The records analyzed here are only a beginning. As more data is collected, these maps and graphs will paint a more accurate picture of distribution and abundance in Alabama. Submit your sightings to albutterflyatlas@gmail.com.
Sightings in the following counties: Baldwin, Bibb, Chilton, Cleburne, Colbert, Coosa, Cullman, Dallas, DeKalb, Escambia, Geneva, Jackson, Jefferson, Lamar, Lauderdale, Lawrence, Lee, Madison, Marengo, Marshall, Mobile, Monroe, Montgomery, Randolph, Shelby, Tuscaloosa, Washington
High count(s):
View county names by moving the mouse over a county or view a map with county names
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ||||||||||||||||||||||||||||||||||||
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3 | 9 | 17 | 8 | 14 | 7 | 2 | 2 | 1 | 3 | 1 | 5 | 1 | 1 | 2 | 5 | 1 | 7 | 4 | 7 | 2 | 4 | 12 | 5 | 6 | 3 | 1 | 2 |
Oak woodlands, oak hammocks, sandhills, and adjacent areas.
Various oaks (Quercus spp.) are reported, particularly Live Oak and White Oak.
The following has been documented in Alabama, but other oak species are almost certainly used as well.
For more information about these plants, please visit the Alabama Plant Atlas using the links above.
Include oaks in your landscape to benefit many butterfly species including White-M Hairstreaks. Post Oak, a known host in Alabama, is extremely drought-tolerant making it well suited for dry unirrigated sites. Use it in the lawn as a shade tree, in naturalized areas, or as a street tree.
White-M Hairstreaks are attracted to nectar-rich flowers, especially in the fall. A landscape that includes plants like wild plums, sweet pepperbush, Climbing Hempvine, Butterfly Milkweed, Mistflower, goldenrods, asters, and Common White Snakeroot may entice White-M Hairstreaks to come down from the treetops.
Click on individual photos to view a larger version that includes photo credits, county, and date.
Photos with comments are indicated by a small, tan dot on the bottom right.