10 Interesting Facts about Frogs you probably did not Know

Frogs are a collective name for certain species in order anurans. The form, however, no single taxonomic group and do not necessarily have a closer relationship with each other than with other species within the order. They differ from toads mainly through the skin is smoother and more humid, and they jump out rather than crawling like frogs do. The species occurs in tropical and temperate regions worldwide. European species are threatened primarily by their wetlands are filled or because of traffic routes which lies between their breeding areas and living areas.

10 Interesting Facts about Frogs you probably did not Know

Even in Sweden we know in large part to the frogs, and will these ten facts you should know about the frog!

A very variable size …

The size varies greatly, from a centimeter to over 30 centimeters of goliath frog. They have long rear limbs that allows them to perform long jumps . The skin is smoother and more humid than in toads. In addition, frogs are not large, bulbous parotidkörtlar behind the eyes as toads. The pupils have an oval shape. Usually there are well developed webbed between the toes on the hind limbs. As all anurans adult frogs lack tails; fry, however, tailed, but the tail disappears gradually as they develop into adults.

Many frog species live under the threat of man’s success …

Many frog species are threatened. The reasons include the ponds and wetlands extensively over the past 200 years drained out, refilled or become overgrown. Although forestry transition from deciduous to coniferous affect many species. Many frogs are killed in traffic when trying to cross the roads that constitute obstacles to migration between breeding and living areas. To protect the frogs so they do not get run over puts security organizations and voluntary people up fencing at the road’s edge.

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Frogs caught in buckets that are ingrävda along the fence and carried then over the road. Often considered the frogs to get an estimate of the area’s population. Another possibility is permanently installed tunnels under the roads, which have become more and more common among smaller roads. One effect of the development is that individual populations are declining in extent, with the result that populations are isolated from each other. The distance between populations eventually becomes so large that few or no individuals are able to wander from one to the other.

Frogs and toads have long heard the stories and legends …

According to Swedish folklore ought to avoid harming a frog – it could be a human, such as a princess, or a supernatural being who appeared in frog form. Sometimes regarded as a frog farm raw that you should be afraid of. A man who wanted to win a girl’s love, would kill a frog, and from its bones to a bone, resembling a hook, and secure it in the girl’s clothes. A person, who divorced snake and frog ate, took capacity to alleviate a woman in labor pains. The word “frog ” in the sense of “ stupid opinion ” is believed to come from a folk tale about a girl from whose mouth frogs jumped when she spoke.

Despite the lack of external ears they hear about us as people …

Frogs have no external ears , but eardrum opens directly onto the skin and is clearly visible from most frogs (unlike the toads, which has blurred the eardrum). Hearing is good, however, and reminds the scope of man. High frequency sounds (over 1000 hertz) perceived directly through the eardrum, while the sounds of lower pitch reaches the inner ear through the bones.

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Unlike tailed amphibians have frog’s vocal cords, and they often communicate with each other with siren calls, and other types of warning sounds. The males are usually at the lower mandibular angles hudpåsar which can be inflated. These are used to increase the latency resonance.

Not even 1% of the larvae survive …

as aquatic larvae (tadpoles) eat the algae, plant parts and small animals, why they work as filtering scavenger. When they turned and started its country life they eat worms, snails , spiders and other bugs . They are also very popular prey for a variety of other organisms – in the water, they often become food for larger insect larvae and on land they are eaten, for example, of various small mammals and birds.

Amphibian’s ways of life and reproduction have been adapted to a high mortality rate in the lower age groups. During the annual spawning season produce, for example, a field frog a female egg mass of approximately 1500 eggs. Of these survive between five and ten until adulthood when they can participate in reproduction.

Recently, zoologists a tiny grodart in Peru …

The year 2009 found the zoologists from including “Museum für Tierkunde” a new grodart in the Andes, South America. The species is so small that it can sit on a thumbnail and has been named Noblella pygmaea (see picture below). The frog was found at 3100 meters altitude in the Valle de Cosnipata in Peru . Unlike most other frog species are fully developed young frogs that come out of the eggs, no tadpoles. The little frog is thus completely adapted to a life on land .

The entire eight different species of frogs in Sweden …


Although most frog species occur in tropical and temperate regions worldwide, we have, after all, the whole eight different species of frogs in Sweden: common frog, moor frog, edible frog, agile frog, pool frog, tree frog, spadefoot toad and bell frog . All these species are protected in the country.

Their eyes helps with digestion …

You may have noticed that frogs often blinks his eyes in conjunction with them to swallow their prey. And yes, that’s right; when a frog swallows its prey flashes the most often, and then presses his eyeballs down on top of the mouth to push food down the throat.

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You do not want to tip the world’s most poisonous frog … 

Poisonous frogs  are a group of frogs belonging to the family “Dendrobatidae”. Far from all poison dart frogs are poisonous and even fewer used for the production of pilgift today. The most toxic of all known species are golden “kokoigiftgroda” (Phyllobates terribilis in Latin). More than 100 toxins have been identified in the skin secretions of poison dart frogs, especially frogs in the genus “Dendrobates” and “Phyllobates”.


The latter is extremely dangerous neurotoxin Batrachotoxin , of which there is sufficient 40 micrograms of dose will be fatal. The golden kokoigiftgrodan is so toxic that it can be enough to touch the frog’s back with the tip of the tongue to transmit a lethal dose of poison. In other words; do not lick or try to kiss, a frog, you do not know!

Most frogs have teeth …

What the layperson may not always tend to think of is that most frogs actually have teeth , but usually only on their upper jaws,  teeth are used to hold the prey in place until the frog may eventually swallow it.

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