Depends on the frog.
There are many different species of frogs. Most are harmless. Some are dangerous because they produce poison. Frogs and toads native to Europe and North America are usually of the harmless kind. The poisonous ones tend to live in warmer places near the equator, such as parts of South America.
That said, frogs and toads are afraid of humans and will try to run away. Even if you were to come across a poisonous frog the only way to be harmed by it is to do something silly, like try to catch it.
Frogs and Spiders
They cause limb malformations.
Crocodiles don't eat frogs because of an acid frogs have that can harm crocodiles if eaten. The acid doesn't effect humans however.
They eat pest insects that would harm your garden.
Pollution can harm frogs by air,food and many others. Frogs are diying out because we use wetlands to build roads and buildings
Tap water contains chemicals such as chlorine and chloramine that are used to treat it. In standard drinking water the levels of these chemicals are not high enough to harm strong, healthy, common frogs. Weak frogs, very small frogs or sick frogs may be adversely affected. If you put tadpoles in tap water they will die.
Sure! It eats insects and frogs. Though, they can't harm bigger animals such as lions.
Not poisonous Simply put, glass frogs are not poisonous. They don’t have any toxins that could harm people or other animals. In fact, they’re considered pretty safe and can make great pets if you can provide for them.
A frogs eyes are on the side of its head which means they are suited to watching out for predators that might harm it rather than looking out for prey, the positioning of the frogs eyes give it a wide field of vision.
Mix a batch of bleach and water, 1/2 cup bleach to 3 gallon water in a insecticide sprayer and spray the ceiling and allow to dry. The dry bleach stings but doesnt harm the frogs wet bellys.
Most species, and there are several, release an alkaloid toxin through their skin. They do not synthesize their own poison but store chemical toxins from some of the insects they eat like ants and termites. This is good since it means that many captive frogs do not have sufficient levels of toxin to harm their owners. It is the secretions of the skin of the poison dart frogs that is toxic. All the frogs of this family "borrow" toxins from what they eat that actually makes the toxins (mostly ants and mites) because the frogs themselves don't manufacture the poisons. These toxins, a few of which can be quite dangerous, are "worn" by the frogs for protection.
Unless they seem to be trapped, just leave them. The frogs will eventually move to another location, and they won't cause harm.