No, some frogs are not poisonous and yes, some frogs are poisonous.
Specifically, some frogs can secrete bufotoxins which target a potential predator's or prey's nervous tissue. The toxic substance may be found stored in the skin on the anuran's back, neck and shoulders. It will be far more commonly found in salamanders and toads than in frogs (Dendrobatoidea superfamily).
A frog red and black in color? Poisonous!
If you see a poisonous frog, stay away from it or else.
The urea in urine is poisonous so don't drink large amounts of urine.
There are more than 1 poisonous species of frog or toad.
The Pickerel Frog the only poisonous frog native to the United States.
The urinary bladder stores the urine in the frog.
Yes, the frog is poisonous because of the way its biology works. It will be poisonous whether captive or free.
The Pacific Tree Frog is not poisonous.
strawberry dart frog.
how to tell if a frog is male or female
no
Skin secretions