Copperhead or Water Snake? The Band Shape Settles It

The copperhead is the most over-reported snake in North America, and the northern water snake is what it usually turns out to be. Most photographs sent to identification groups labelled "copperhead in my yard" are something else entirely, and the most common something else is a water snake.

There is one difference that settles it, and it works from a photograph taken at a distance.

The hourglass test

Look at the dark crossbands and ask where each band is widest.

Copperhead: each band is wide at the bottom, where it meets the belly, and pinches to a narrow waist over the spine. Seen from the side, each band looks like a Hershey's Kiss standing on the ground. Seen from above, the pairs form a series of hourglasses down the back.

Water snake: each band is wide across the spine and tapers as it goes down the sides. Seen from above the bands look like broad saddles.

This is the reverse of each other, and once you have seen it you cannot unsee it.

If you are looking at the snake from directly above and the bands look like fat rectangles across the back, you have a water snake. If they look like bow ties or hourglasses pinched in the middle, take copperhead seriously.

The second test: colour and finish

Copperheads are pale. The ground colour is tan, buff, or a distinctly pinkish light brown, and the bands are a warm chestnut. The whole snake has a matte, dusty finish.

Water snakes are dark. Brown, grey-brown, or nearly black, especially when wet, and heavily keeled, so they look rough rather than smooth. An old northern water snake can be so dark that the pattern is barely visible at all.

If the snake in your photograph is dark and looks wet, it is almost certainly not a copperhead.

The third test: the head

A copperhead's head is a plain, unmarked coppery orange — the origin of the name. No stripes, no blotches, no bar between the eyes.

Water snakes have a dark stripe running from the eye back to the angle of the jaw. Juvenile ratsnakes, another common source of copperhead reports, have a dark bar across the head between the eyes.

Quick reference

The other copperhead impostors

Juvenile eastern ratsnakes are grey with dark grey blotches and are reported as copperheads constantly. The giveaway is the absence of any copper or tan tone at all — they are grey on grey.

Corn snakes are reddish and blotched, which fools people, but their markings are saddles with sharp black outlines that sit on the back and do not run down to the belly. Their belly is a bold black-and-white chequerboard, which no copperhead has.

Eastern milk snakes have red-brown saddles outlined in black on a grey ground, plus a chequerboard belly.

The pattern here is worth noticing: copperhead bands run all the way down the sides to the belly. Blotches and saddles sit on the back and stop. If the markings do not reach the belly, it is not a copperhead.

What to do either way

Nothing changes based on the answer. Give it room, keep pets and children away, and let it move on. Copperheads freeze rather than flee, so a snake that has not moved is not necessarily being aggressive — it is hoping you have not seen it.

If it is somewhere genuinely problematic, most states have wildlife removal services, and many herpetological societies run free relocation volunteers. Do not attempt it yourself: a large share of copperhead bites happen during amateur removal attempts.