The Acmon Blue is told immediately from other related species by the lovely orange and black-spotted band inside the margin of the high wing. The male is lighter blue color than the female, which also has considerable brown color. These delicate little blue butterflies flit gently among the grasses and flowers of meadows and gardens, usually fluttering so helplessly that they are easy to catch. They do have one protection against birds and that is by lighting on a grass stem and folding the wings. The sudden disappearance of the blue color of the upper wings, being replaced by the lighter colors of the undersides must be confusing to a bird, even though the butterfly does not become completely camouflaged.
In the dark jungles of Central America and South America all kinds of animals and birds and insects hunt butterflies. Life for a butterfly in these places is one continual flight from danger. Some butterflies escape by their swift flight, others by camouflaging themselves to look like bark or leaves. Still others carry a poisonous substance within them that make most other creatures leave them alone in disgust. But perhaps the most interesting way of all is when one butterfly mimics or copies the appearance of a poisonous butterfly so it too will be left alone.
A wingspread of nearly three inches makes this butterfly one of the largest of the Arctics, so called because they are most often found in the far north or on mountain tops. In the forests of British Columbia, and southward through the mountains to California, the Greater Arctic secretively hides upon the decaying bark and dark mosses of fallen trees. But the males seem to be possessed by a great curiosity, for every so often they dart out to investigate some passing insect or lizard or even a man. The more placid females usually stay in hiding, but when they do fly their flight is so slow and stately that they are easily netted by the collector. Whether the vigilant and active males are actually trying to protect the females is not definitely known, but they sometimes act as though they were trying to either drive away or even lure away an intruder.
What a fooling you may be in for when you try to capture a Comma! Bang! You sweep your net through the air, expecting to capture the butterfly, and instead you are left foolishly staring into your net, while the insect has completely disappeared. Watch carefully for awhile and you will see why this has happened. The Comma, like other Angle-wings, is equipped with a very efficient disappearing act. Besides being a good dodger of nets and bird beaks, it has colors on the undersides of the wings that make it look exactly like the brown bark of certain trees when it folds its wings. By lighting suddenly on one of these trees it quite literally disappears. Only a very sharp eye can see it resting there, the dark underwings merging in perfect camouflage with the dark bark.
The meadows are lushly green; dew sparkles on the leaflets; the air is pleasantly warm and delightful; then, almost magically it seems, the carpets of new-born buttercups by the creeks come alive with the bright flashing of Orange-Tip wings. It is the spring brood of the Orange-Tip come with the first wave of real warmth to gladden the land with new beauty. The sharply-marked orange and black of the upper corners of the fore-wings, contrasting to abruptly with the white of the rest of the wings instantly mark this butterfly from all others save the rare Felder’s Orange-Tip, (A. ce-thura), which, however has much less black. Note also the soft leaf-like appearance of the under-wing markings. A rare from has the wings suffused with yellow. In the east the Falcate Orange Tip (Anthocaris genutia) with a hooked wing tip, is found in woods.