Question: Orthetrum brachiale is found in which country bordered by Lybia and Sudan ?
Context: Chad ( ; Arabic: تشاد‎ ‎ "Tshād "; French: "Tchad" ] ), officially the Republic of Chad (Arabic: جمهورية تشاد‎ ‎ "Jumhūrīyat Tshād "; French: "République du Tchad" "Republic of the Chad"), is a landlocked country in Central Africa.  It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest and Niger to the west.  It is the fifth largest country in Africa in terms of area. Orthetrum stemmale is a species of dragonfly in the family Libellulidae.  It is found in Angola, Benin, Botswana, Cameroon, Central African Republic, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gambia, Ghana, Guinea, Kenya, Liberia, Malawi, Mali, Mozambique, Namibia, Nigeria, São Tomé and Príncipe, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Zambia, Zimbabwe, and possibly Burundi.  Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, intermittent rivers, shrub-dominated wetlands, swamps, intermittent freshwater lakes, freshwater marshes, and intermittent freshwater marshes. Orthetrum triangulare is an Asian freshwater dragonfly species.  It is usually found in hilly and montane areas, and breeds in small ponds and marshy areas, and is tolerant of disturbance.  The common name for this species is blue-tailed forest hawk.  Two subspecies of Orthetrum triangulare are currently recognised, the nominate subspecies and "O. t. malaccense". Eueides lybia, the lybia longwing, is a butterfly of the Nymphalidae family.  It was described by Johan Christian Fabricius in 1775.  It is found from Central America to northern South America, from Nicaragua to Bolivia. Orthetrum brachiale, the tough skimmer or strong skimmer, is a species of dragonfly in the family Libellulidae.  It is found in Angola, Benin, Botswana, Burkina Faso, Cameroon, Central African Republic, Chad, Comoros, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Egypt, Equatorial Guinea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mauritania, Mauritius, Mozambique, Namibia, Niger, Nigeria, Réunion, Seychelles, Sierra Leone, Somalia, South Africa, Sudan, Tanzania, Togo, Uganda, Zambia, Zimbabwe, possibly Burundi, and possibly São Tomé and Príncipe.  Its natural habitats are subtropical or tropical moist lowland forests, dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, shrub-dominated wetlands, swamps, intermittent freshwater lakes, freshwater marshes, and intermittent freshwater marshes. Egypt ( ; Arabic: مِصر‎ ‎ "Miṣr ", Egyptian Arabic: مَصر‎ ‎ "Maṣr" , Coptic: "Kimi"), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia by a land bridge formed by the Sinai Peninsula.  Egypt is a Mediterranean country bordered by the Gaza Strip and Israel to the northeast, the Gulf of Aqaba to the east, the Red Sea to the east and south, Sudan to the south, and Libya to the west.  Across the Gulf of Aqaba lies Jordan, and across from the Sinai Peninsula lies Saudi Arabia, although Jordan and Saudi Arabia do not share a land border with Egypt. The Sudan or Sudan ( , ; Arabic: السودان‎ ‎ "as-Sūdān") also known as North Sudan since South Sudan's independence and officially the Republic of the Sudan (Arabic: جمهورية السودان‎ ‎ "Jumhūriyyat as-Sūdān"), is a country in Northern Africa.  It is bordered by Egypt to the north, the Red Sea, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the southwest, Chad to the west and Libya to the northwest.  It is the third largest country in Africa.  The River Nile divides the country into eastern and western halves.  Before the Sudanese Civil War, South Sudan was part of Sudan, but it became independent in 2011.  Its predominant religion is Islam. Lybia tessellata is a species of small crab in the family Xanthidae.  It is found in shallow parts of the tropical Indo-Pacific Ocean.  Like other members of the genus "Lybia", it is commonly known as the pom-pom crab or boxer crab because of its habit of carrying a sea anemone around in each of its claws, these resembling pom-poms or boxing gloves. Sudan, officially the Republic of the Sudan, is a country in North Africa, bordered by Egypt to the north, the Red Sea, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the southwest, Chad to the west and Libya to the northwest.  In 2010, Sudan was considered the 17th-fastest-growing economy in the world and the rapid development of the country largely from oil profits even when facing international sanctions was noted by "The New York Times" in a 2006 article.  Because of the secession of South Sudan, which contained over 80 percent of Sudan's oilfields, the economic forecast for Sudan in 2011 and beyond is uncertain. Egypt is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia by a land bridge formed by the Sinai Peninsula.  Egypt is a Mediterranean country bordered by the Gaza Strip and Israel to the northeast, the Gulf of Aqaba to the east, the Red Sea to the east and south, Sudan to the south, and Libya to the west.  Across the Gulf of Aqaba lies Jordan, and across from the Sinai Peninsula lies Saudi Arabia, although Jordan and Saudi Arabia do not share a land border with Egypt.  It is the world's only contiguous Afrasian nation.
Answer: Chad