Tonbi: Milvus migrans

The Black Kite’s Japanese name is Tobi and the scientific name is Milvus migrans. They are birds which are migratory birds or resident birds. They are raptors and Accipitrida . So they are bigger than almost all other raptor species. The males are 58.5 cm long and the females are 68.5 cm long. Females are bigger than males. They have wingspread of 150~160 cm. Their body color is blown and beaks are sharp and curved.

They are five varieties of the subfamily hawk. Milvus migrans milvus, Milvus migrans lineatus, Milvus migrans parasitus, Milvus migrans grovinda and Milvus migrans affinis . Milvus migrans milvus live in Europe. Milvus migrans lineatus live in Central Asia. Milvus migrans parasitus live in Africa. Milvus migrans grovinda live in India. Milvus migrans affinis live in Australia. M.m.milvus and M.m.lineatus are migratory bird, while M.m are parasites, M.m.grovinda and M.m.affinis are resident birds. Migratory birds live in cool temperature zones. On the other hand, resident birds live in warm temperature zones. Migratory birds can’t live in cold season. So they move to warm country.

Black kite’s habitats are mountain, seaside, harbor, rivers, agricultural land, lake and marshes and city. They live in various habitat. Because they have ability that suit the environment. They live especially in harbors.

Black kite eat prey type or omnivorous type. Prey type live in the suburbs. They eat animals, carcasses, flogs, lizards, snakes and fishes. On the other hand omnivorous type live in the city. They eat animals, carcasses, flogs, lizards, snakes and fishes. In addition, they eat garbage and people’s lunches. There are many people and many foods in the city so there is lots of garbage. Black kites are suit for the environment so they are omnivorous. Black kite glide using convection in the sky. There action is soaring. Soaring is to glide to using convection and flap in its wing. They look for bait when they glide in the sky. Next, they dive and catch the bait. From the outset they are very wary. But they are tames to people recently. So they rob food from people. People are injured by them. Black kites die often because their food and danger prediction ability very low.

Black kite doesn’t have fine brain and learning ability, so can’t predict danger in well. And they glide useing convection in the sky. So they are cause of birdstrike. Birdstrike is accident and black kite is caught into the air plane’s engine. There aren’t good statistics on this.

Black kites live and are found in Kochi. They like to get bait in easy places. So they find easy fishing port or rural areas. Their song is “Peep―hyolololo”. If you want to look them, you should go seaside or rural areas, for example Usa, Susaki, Muroto, Asizuri, Katsurahama Motoyama-chou, Otoyo –chou are good. Especially Usa is famous fishing ground. So there is gotten many fishes by fisherman. Black kites aim for many fishes. It is near Kochi city and you get there in thirty minutes by car. Probably you can find many black kites with in a short distance. You can find them in others places too.

Published by

Bio2010

Students of Kochi National University English for Biology class, 2010

10 thoughts on “Tonbi: Milvus migrans”

  1. I was surprised that Black kite doesn’t have fine brain.
    I supposed that Black kite have fine brain.
    I am disappointed at this truth.

  2. I was surprised at “ They have wingspread of 150~160 cm. ”
    Black kites is so big!!
    I want to see a Black kites.

  3. I knew that its size is different between males and females.
    I understood that there are a lot of habitats of Black kite.
    I thought that I want to see it.

  4. I surprised about they have ability that suit the environment.
    I don’t know about them.

  5. I love raptorial so I love black kite too.
    I surprise that is female large than male and this bird migratory bird.

  6. Tobi is very cool bird. But I’m worry what tobi is cause of birdstrike. I want to see Tobi, so I want to go to Usa.

  7. I was suprised they rob food from people. People are injured by them. Black kites die often because their food and danger prediction ability very low.

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