The Province of Treviso () is a province in the Veneto region of Italy. Its capital is the city of Treviso.
The province of Treviso has an area of and is formed mainly by plains but there are hills in the northern part. In the border with the Belluno province, there are some mountains over high, found mainly in the Dolomites, part of the eastern Alps; the highest mountain of the province is Monte Grappa ) that is high and is on the border with the Belluno and Vicenza provinces.
The province is rich in water; the main river is the Piave river that flows through the province from north to south.
The province of Treviso borders to the north with the Belluno province, to the east with the Friuli Venezia Giulia region (Pordenone province), to the south with the Padua province and the Metropolitan City of Venice, and to the west with the Vicenza province.
, there are 885,447 persons living in the province, for a population density of inhabitants/km².
Evolution of the population in the Treviso province
There are 95 municipalities (or "comuni") in the province; they are:
The following shows the 12 "comuni" with the population, and the area and altitude.
Province of Venice
Venice (or ) is a province in the region of Veneto in Italy.
Bullfrog
The American bullfrog ("Rana catesbeiana" or "Lithobates catesbeianus") is a semi-aquatic frog. It belongs to the family Ranidae, or 'true frogs'. Bullfrogs are native to most of North America, Canada and Mexico. The ones that live in northern America hibernate during winter. However, bullfrogs in southern US states are active all the time. Bullfrogs have been seen in South America, Asia, Western Europe and the Caribbean. These bullfrogs were brought on ships. Many people, including pet owners, have placed bullfrogs outside of their native area. They have done this: on purpose because they no longer want them, to control the pest population, or by accident by catching them in fishing nets.
Bullfrogs can adapt and live almost anywhere if there is water nearby. They can eat rodents, insects, small fish, arachnids, small birds, crustaceas, small mammals, worms, and other frogs. Because of this, they have been blamed for many animal extinctions. Bullfrogs live in large bodies of water such as swamps, lakes, and ponds. They like to stay near the edge of the water. During a rainstorm, they may travel on land. They travel in search of a new habitat.
Bullfrogs are prey to various birds like herons, and their life in the wild is much less than in captivity. One captive bullfrog lived almost 16 years. The name "bullfrog" was given because males roar when mating with a female. Bullfrogs can be kept as pets. Captive bullfrogs are given rodents, small fish, crickets, worms, and fruit flies as food and treats. Pet owners may add supplements on the frogs food for health. Bullfrogs can host many viruses, bacteria and parasites. They were blamed for an intraerythrocytic virus outbreak in Canada in 1997. Bullfrogs are the cause of the chytrid fungus spreading into Arizona. The fungus is one of the main reasons that there are fewer amphibians.
A female bullfrog can lay up to 20,000 eggs. Bullfrog tadpoles take up to a year to become a young frog. Males will stay behind and take care of the tadpoles. Males are territorial and will attack any animal, including their own kind, if they come near them. Bullfrogs can reduce the mosquito population. They do this by eating most of the mosquito's larvae. Bullfrogs do not move during the day, except if there is food nearby or when threatened.
Bullfrog legs are eaten by humans. The International Union for the Conservation of Nature (IUCN) rates the bullfrog as "Least Concern", which means that they are not an endangered species. However, they are dying because of habitat loss, water pollution, pesticides, and over harvesting.
The American bullfrog ("Rana catesbeiana") is its common name. It is one of 90 species of the genus "Rana".
In Quebec, Canada and Louisiana US the bullfrog is called ouaouaron "(wa'wa'ron)"; a word originating in the Wendat language and borrowed in the 17th century"." The American bullfrog is also known as "Lithobates catesbeianus". The parent family for "Rana" is Ranidae, or "true frogs".
The Ranidae is split into nine sub families. "Ceratobatrachinae" (southeast Asia), "Conrauinae" (Africa), "Dicroglossinae", "Micrixalinae" (India), "Nyctibatrachinae" (India), "Petropedetinae" (Africa), "Ptychadeninae" (Africa), "Raninae" (Australia, South America), and "Ranixalinae" (India). The American bullfrog's genus name comes from the Latin word rana, which means frog.
Bullfrogs were first described in 1802 by George Shaw. Shaw described the bullfrog in his book "General Zoology or Systematic Natural History". A bullfrogs call is a slow deep "g-r-r-u-u-u-u-m". Young bullfrogs will make a high pitch chirp before going in the water. Bullfrogs have toxic skin, though it is not harmful to humans. The toxins make it less likely that other animals will eat them.
The American bullfrog is the largest of the "true frogs" family. Bullfrogs can reach a length of . Females are larger than males. Bullfrogs can weigh up to . Bullfrogs are either brown or green. They also have darker spots on their back. Bullfrogs have webbed feet for swimming. They can leap up to . Male bullfrogs can be heard roaring when mating with a female. Males also have bigger tympanic membranes which cover their ears. Bullfrogs have brown or gold eyes. They also have broad flat heads and bodies. The mouth of a bullfrog are small and have tiny teeth inside.
Bullfrogs can live up to 4–5 years. There was one captive bullfrog that had lived up to 18years. Males are territorial and will attack any animal, including their own kind, if they come near them. They will jump, wrestle, and even chase any animal away. Bullfrogs are good at hearing. A group of bullfrogs are called an "army".
Bullfrogs are known to have many viruses and bacteria. However, only a few of them are important to nature. Bullfrogs were blamed for an intraerythrocytic virus outbreak in Canada in 1997. They were also blamed for a chytrid fungus that spread into Arizona in 2000. The chytrid fungus is believed to be one of the major causes of the decline in amphibian populations. Many bullfrogs can have parasites including helminths, trematodes, nematodes, protozoans and leeches.
In a 1913 study, it was found that bullfrogs will eat any animal it can overpower and stuff down its throat. Bullfrog stomachs have been found to have rodents, baby muskrats, small turtles, snakes, frogs (including bullfrogs), birds, and a bat, as well as the many invertebrates, such as insects. These studies show the bullfrog's diet is unique among North American "Rana". Bullfrogs are also known to eat ducklings and tadpoles. Bullfrogs have teeth on the top of their mouths. Their tongues are capable of flipping their food into their mouths. Bullfrogs will eat at night.
In captivity, pet bullfrogs are given crickets, worms, small fish, rodents, and fruit flies. In the wild they like to eat crayfish, water beetles, snails, and dragon fly larvae. Bullfrogs may eat each other, this makes up of 80% of their diet. In a 1935 study, it was found that smaller bullfrogs eat mostly insects. However, larger bullfrogs eat crayfish, frogs and mice. In an Arizona study in 1988, it was found that bullfrogs there eat invertebrates such as snails and insects. While two other studies, one in 1977 (in New Mexico) and the other in 1993 (in New York), found that bullfrogs in New York eat mostly "Ranidae" frogs. The study from New Mexico, found that bullfrogs there eat mostly toads. Adults can help decrease the mosquito population by eating most of their larvae.