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Fun Facts
Did You Know?
The toxin is a skin secretion produced in granular glands throughout the frog's skin. The compounds are alkaloids similar in chemistry to those found in poison dart frogs, though in much lower concentrations. A poison dart frog can kill a human. A pickerel frog can make a snake deeply uncomfortable. The difference in concentration is significant, but the basic chemistry rhymes. The effect on predators is immediate and memorable. A snake that bites a pickerel frog will release it quickly and spend the next several minutes trying to rid its mouth of the taste — gaping, rubbing its snout on the…
If This Animal Could Talk...
"Watch closely, respect my space, and let my habitat explain the rest of the story."
Most frogs that can kill you are brightly colored and live in the tropics. The pickerel frog is a North Louisiana stream frog that can kill other frogs, makes snakes regret their decisions, and looks completely unremarkable until you notice the spots — at which point it still looks pretty unremarkable, just organized. It is not flashy. It is not rare. It is a two-to-three-inch brown frog sitting on a gravel bar in a clear creek in Winn Parish, and the only reason anything in the ecosystem treats it with respect is chemistry. They are toxic. The skin secretes a substance that can deter or harm snakes and other animals that try to eat them, and this substance is also harmful to other frogs — so pickerel frogs are avoided by the species they share water with, the way you'd avoid a coworker who is technically allowed to be in the break room but whose presence consistently creates problems for everyone in the immediate vicinity through no apparent intention of their own. If you are a frog in a container with a pickerel frog and the pickerel frog becomes stressed, there is a non-zero chance you will die from the toxin secreted by your container-mate. This is why biological supply companies ship pickerel frogs separately, and why field biologists who handle multiple frog species wash their hands between frogs. Lithobates palustris is native to eastern North America and found in a variety of habitats: wetlands, forests, meadows, and streams. In North Louisiana, they are relatively common in the cooler, clearer stream habitats of the northern parishes — easy to spot if you know what you're looking for, which is square spots and bright yellow thighs that flash when the frog jumps.
A Few More Facts
How they hunt and forage: The skin secretes a substance that can deter or harm snakes and other animals that try to eat them, and this substance is also harmful to other frogs — so pickerel frogs are avoided by the species they share water with, the way you'd avoid a coworker who is technically allowed to be in the break room but whose presence consistently creates problems for everyone in the immediate vicinity through no apparent intention of their own. The experience is unpleasant enough that many snakes avoid pickerel frogs in future encounters, though some individuals develop tolerance and eat them anyway, which is impressive commitment to a bad idea. The association is one of coexistence rather than predation; pickerel fish do eat pickerel frogs when they can, which means the frog named after a fish is also occasionally eaten by that fish, a situation the frog did not negotiate and shows no awareness of.
Live birth or eggs? no
When young are born: See the detailed species sections below.
Photo Gallery
What Is the Pickerel Frog Often Confused With?
The spots are the first thing and the most important thing. The back is covered with dark brown spots arranged in two parallel rows — squarish, distinctly angular, laid out with the kind of orderliness that suggests the developmental process had opinions about chaos. The pickerel frog is the only North Louisiana frog whose spot pattern looks like it was placed with a ruler. Every other spotted frog in the state has random scatter. The pickerel frog has columns. This is the field mark. Everything else is supporting evidence. Adults measure about two to three inches — larger than chorus frogs and cricket frogs, smaller than bullfrogs, roughly equivalent to southern leopard frogs. The background is brown or gray. If the frog is moving at high speed away from you before you can confirm the spot pattern, wait for it to stop. The frog will stop eventually. Probably. The inner thighs and groin area are bright yellow or orange, visible when the frog jumps or when the legs are extended. This flash coloration is not decorative — it is a hazard warning posted in the place that's most visible mid-leap. The message is clear: I am toxic, eating me will be unpleasant, I flash yellow specifically so you remember this interaction and make better choices next time. The color is highlighter yellow or safety-cone orange, and it is designed to be memorable. It works. The belly is white or cream with dark mottling, as if someone spilled ink on a white surface and gave up halfway through cleaning it. The dorsolateral folds — raised ridges running from behind the eyes toward the hind legs — are prominent and continuous, similar to those on southern leopard frogs. The hind legs are long and powerful, and the toes are webbed. Males are slightly smaller than females and develop enlarged, rough-textured thumbs during breeding season for gripping females in amplexus — a feature that is extremely useful for breeding and essentially useless for everything else, which is why it disappears afterward.
Drag the handle left and right to compare Pickerel Frog side by side with the species it gets mistaken for most.
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Accessibility
Accessibility
Pickerel frogs are among the more manageable amphibians for deliberate observation because they are diurnal, habitat-specific, and present at stream-based locations that are often accessible by trail or vehicle. Clear, rocky-bottomed streams in Kisatchie National Forest, Red River NWR, and D'Arbonne NWR all have improved road or trail access that brings observers within range of pickerel frog habitat without requiring difficult navigation. For visitors with mobility limitations, vehicle-based observation along stream-crossing roads on warm spring mornings is productive.
Pickerel frogs bask on rocks and gravel bars near the water's edge, visible from bridge railings and road shoulders. The diurnal activity pattern means no night driving required — daylight observation on a warm March morning is the peak window. For visitors who are blind or have low vision, the pickerel frog's snoring call is locatable by ear at close range during breeding season. Within fifty feet of a calling male, the snore-and-pause pattern is distinct from bullfrog rumble and chorus frog trill.
Following the sound to the breeding site and listening for the spatial concentration of calling males identifies the breeding pool. A companion familiar with frog calls can help narrow the location further.
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Frequently Asked Questions
Does Pickerel Frog live in North Louisiana?
Yes. The pickerel frog is a North Louisiana stream frog that can kill other frogs, makes snakes regret their decisions, and looks completely unremarkable until you notice the spots — at which point it still looks pretty unremarkable, just organized. In North Louisiana, they are relatively common in the cooler, clearer stream habitats of the northern parishes — easy to spot if you know what you're looking for, which is square spots and bright yellow thighs that flash when the frog jumps. The pickerel frog is the only North Louisiana frog whose spot pattern looks like it was placed with a ruler.
How do you identify Pickerel Frog?
The spots are the first thing and the most important thing. The back is covered with dark brown spots arranged in two parallel rows — squarish, distinctly angular, laid out with the kind of orderliness that suggests the developmental process had opinions about chaos. The pickerel frog is the only North Louisiana frog whose spot pattern looks like it was placed with a ruler. Every other spotted frog in the state has random scatter. The pickerel frog has columns. This is the field mark. Everything else is supporting evidence. Adults measure about two to three inches — larger than chorus frogs and cricket frogs, smaller than bullfrogs, roughly equivalent to southern leopard frogs. The background is brown or gray. If the frog is moving at high speed away from you before you can confirm the spot pattern, wait for it to stop. The frog will stop eventually. Probably. The inner thighs and groin area are bright yellow or orange, visible when the frog jumps or when the legs are extended. This flash coloration is not decorative — it is a hazard warning posted in the place that's most visible mid-leap. The message is clear: I am toxic, eating me will be unpleasant, I flash yellow specifically so you remember this interaction and make better choices next time. The color is highlighter yellow or safety-cone orange, and it is designed to be memorable. It works. The belly is white or cream with dark mottling, as if someone spilled ink on a white surface and gave up halfway through cleaning it. The dorsolateral folds — raised ridges running from behind the eyes toward the hind legs — are prominent and continuous, similar to those on southern leopard frogs. The hind legs are long and powerful, and the toes are webbed. Males are slightly smaller than females and develop enlarged, rough-textured thumbs during breeding season for gripping females in amplexus — a feature that is extremely useful for breeding and essentially useless for everything else, which is why it disappears afterward.
What does Pickerel Frog eat?
The skin secretes a substance that can deter or harm snakes and other animals that try to eat them, and this substance is also harmful to other frogs — so pickerel frogs are avoided by the species they share water with, the way you'd avoid a coworker who is technically allowed to be in the break room but whose presence consistently creates problems for everyone in the immediate vicinity through no apparent intention of their own.
The experience is unpleasant enough that many snakes avoid pickerel frogs in future encounters, though some individuals develop tolerance and eat them anyway, which is impressive commitment to a bad idea. The association is one of coexistence rather than predation; pickerel fish do eat pickerel frogs when they can, which means the frog named after a fish is also occasionally eaten by that fish, a situation the frog did not negotiate and shows no awareness of.
Is Pickerel Frog dangerous to people?
No. This species is not dangerous to people when it is observed without handling or disturbance
