paragraph_text: Situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs and cays. (See the list.) These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea. The Caribbean islands, consisting of the Greater Antilles on the north and the Lesser Antilles on the south and east (including the Leeward Antilles), are part of the somewhat larger West Indies grouping, which also includes the Lucayan Archipelago (comprising the Bahamas and Turks and Caicos Islands). The Lucayans and, less commonly, Bermuda, are also sometimes considered Caribbean despite the fact that none of these islands border the Caribbean Sea. In a wider sense, the mainland countries, regions, and territories of Belize, the Caribbean region of Colombia, Cozumel, the Yucatán Peninsula, Margarita Island, the Guyanas (Guyana, Suriname, French Guiana, Guayana Region in Venezuela, and Amapá in Brazil), are often included due to their political and cultural ties with the region.

paragraph_text: The Wanggao warty newt (Paramesotriton fuzhongensis) is a species of salamander in the family Salamandridae found only in northeastern Guangxi, China, in Zhongshan, Fuchuan and Gongcheng counties. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical seasonally wet or flooded lowland grassland, and rivers.

paragraph_text: The North American river otter (Lontra canadensis), also known as the northern river otter or the common otter, is a semiaquatic mammal endemic to the North American continent found in and along its waterways and coasts. An adult river otter can weigh between 5.0 and 14 kg (11.0 and 30.9 lb). The river otter is protected and insulated by a thick, water - repellent coat of fur.

paragraph_text: The Cuyuni River is a South American river and a tributary of the Essequibo River. It rises in the Guiana Highlands of Venezuela where it descends northward to El Dorado, and turns eastward to meander through the tropical rain forests of Guyana. It finally turns southeastward, flowing to its confluence with the Mazaruni River. The Cuyuni River marks the limit of the disputed territory of Guayana Esequiba for approximately .

paragraph_text: Lock Island is an island in the River Thames in England connected to Shepperton Lock, near Shepperton. There is a stretch of open ground where refreshments are served, making the island a popular place to visit or stop and rest. The Thames River Police have a station on the Island. The Weybridge Mariners' Boat Club is also situated there. The island is connected to Hamhaugh Island by a walkway across the weir.

paragraph_text: Balagas River is a river of northern Ethiopia. A tributary of the Tekezé, its own tributaries include the Balessa and Dorana rivers.

paragraph_text: Indian River Shores is a town on Orchid Island, in Indian River County, Florida, United States. The population was 3,901 at the 2010 census, up from 3,448 at the 2000 census. It was ranked ninth in Florida locations by per capita income as of 2010.

paragraph_text: Perdido Bay is a bay at the mouth of and draining the Perdido River, a designated Outstanding Florida Waters river, in Baldwin County, Alabama and Escambia County, Florida, United States. It is essentially a coastal lagoon enclosed by barrier islands, with an inlet, Perdido Pass.

paragraph_text: The Atbarah River (; transliterated: Nahr 'Atbarah) in northeast Africa rises in northwest Ethiopia, approximately 50 km north of Lake Tana and 30 km west of Gondar. It flows about 805 km (500 mi) to the Nile in north-central Sudan, joining it at the city of Atbarah (). The river's tributary, the Tekezé (Setit) River, is perhaps the true upper course of the Atbarah, as the Tekezé follows the longer course prior to the confluence of the two rivers (at 14° 10' N, 36° E) in northeastern Sudan. The Atbarah is the last tributary of the Nile before it reaches the Mediterranean.

paragraph_text: The Tekezé River rises in the central Ethiopian Highlands near Mount Qachen within Lasta, from where it flows west, north, then west again, forming the westernmost border of Ethiopia and Eritrea from the confluence of the Tomsa with the Tekezé at to the tripoint between the two countries and Sudan at . After entering northeastern Sudan at the tripoint it joins the Atbarah River, which is a tributary of the Nile. The Tekezé is perhaps the true upper course of the Atbarah, as the former follows the longer course prior to the confluence of the two rivers.

paragraph_text: The American white ibis (Eudocimus albus) is a species of bird in the ibis family, Threskiornithidae. It is found from Virginia via the Gulf Coast of the United States south through most of the coastal New World tropics. This particular ibis is a medium - sized bird with an overall white plumage, bright red - orange down - curved bill and long legs, and black wing tips that are usually only visible in flight. Males are larger and have longer bills than females. The breeding range runs along the Gulf and Atlantic Coast, and the coasts of Mexico and Central America. Outside the breeding period, the range extends further inland in North America and also includes the Caribbean. It is also found along the northwestern South American coastline in Colombia and Venezuela. Populations in central Venezuela overlap and interbreed with the scarlet ibis. The two have been classified by some authorities as a single species.

paragraph_text: North Dakota is in the U.S. region known as the Great Plains. The state shares the Red River of the North with Minnesota to the east. South Dakota is to the south, Montana is to the west, and the Canadian provinces of Saskatchewan and Manitoba are to the north. North Dakota is situated near the middle of North America with a stone marker in Rugby, North Dakota marking the ``Geographic Center of the North American Continent ''. With an area of 70,762 square miles (183,273 km), North Dakota is the 19th largest state.

paragraph_text: Many adult insects use six legs for walking and have adopted a tripedal gait. The tripedal gait allows for rapid walking while always having a stable stance and has been studied extensively in cockroaches. The legs are used in alternate triangles touching the ground. For the first step, the middle right leg and the front and rear left legs are in contact with the ground and move the insect forward, while the front and rear right leg and the middle left leg are lifted and moved forward to a new position. When they touch the ground to form a new stable triangle the other legs can be lifted and brought forward in turn and so on. The purest form of the tripedal gait is seen in insects moving at high speeds. However, this type of locomotion is not rigid and insects can adapt a variety of gaits. For example, when moving slowly, turning, or avoiding obstacles, four or more feet may be touching the ground. Insects can also adapt their gait to cope with the loss of one or more limbs.

paragraph_text: Buck Ait is an island in the River Thames in Oxfordshire, England. It is on the reach above Shiplake Lock near Sonning.

paragraph_text: The Orikaka River (also known as the Mackley River) is a river of the West Coast Region of New Zealand's South Island. It flows southwest from the southern end of the Matiri Range before turning south to flow into the Buller River five kilometres to the west of Inangahua.

paragraph_text: The Bonanza Range is a small mountain range on Vancouver Island, British Columbia, Canada, located in the area between the Nimpkish River and the Tsitika River. It has an area of 150 km and is a subrange of the Vancouver Island Ranges which in turn form part of the Insular Mountains.

paragraph_text: The North Branch of the Millers River is a river in southwestern New Hampshire and northern Massachusetts in the United States. It is a tributary of the Millers River, which flows west to the Connecticut River, which in turn flows south to Long Island Sound, an arm of the Atlantic Ocean.

paragraph_text: The Orinoco River () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the third largest river in the world by discharge volume of water. The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the llanos of Colombia. The environment in the Orinoco's basin is extremely diverse; it hosts a wide variety of flora and fauna.

paragraph_text: The Four Continents, also known as The Four Rivers of Paradise, is a painting by Flemish artist Peter Paul Rubens, made in the 1610s. It depicts the female personifications of, what, at the time, were believed to be four continents (Europe, Asia, Africa and America) sitting with the personifications of their respective major rivers – the Danube, the Ganges, the Nile and the Río de la Plata. Europe is shown on the left, Africa in the middle, Asia on the right and America behind it, to the left. The tigress, protecting the cubs from the crocodile, is used as a symbol of Asia. The personification of the Danube holds a rudder. The bottom part of the painting shows several putti. Painted during a period of truce between the Dutch Republic and Spain, the river allegories and their female companions in a lush, bountiful setting reflect the conditions that Rubens hoped would return to Antwerp after military hostilities.

paragraph_text: Historically the particular routes were also shaped by the powerful influence of winds and currents during the age of sail. For example, from the main trading nations of Western Europe it was much easier to sail westwards after first going south of 30 N latitude and reaching the so - called ``trade winds ''; thus arriving in the Caribbean rather than going straight west to the North American mainland. Returning from North America, it is easiest to follow the Gulf Stream in a northeasterly direction using the westerlies. A similar triangle to this, called the volta do mar was already being used by the Portuguese, before Christopher Columbus' voyage, to sail to the Canary Islands and the Azores. Columbus simply expanded the triangle outwards, and his route became the main way for Europeans to reach, and return from, the Americas.

Question: At least how many tropical islands are found in middle leg of the journey from the continent Tekezé River is located to the Americas?
Answer: more than 700