Dive or diving (English: Little Grebe or Dabchick; Scientific name: Tachybaptus ruficollis) Tachybaptus is a small form of people belonging to the Podicipedidae genus
Aquatic birds [2] Due to its unusual ability to swim and dive, the name Diver has been named. Although there is a diver's room across the vast area, these numbers are less and the numbers are decreasing day by day. There are about 6,10,000 to 35 lakh divers in the whole of the world, covering 330 million square kilometers. [3]
Physical structure
Diver small throats and eyes small petals aquatic birds. Look like a petty duck chan. The body is very oval, deep enough to dive into the water. Its length is 23 to 29 centimeters. The wings range from 40 to 45 centimeters. Weight 150 to 200 grams [4] In winter, they seem to be completely different in one and the other. Wife and male diving look similar.
Normal structure
The head of the diver and the neck behind the neck and neck is black. The black hat of the head surrounds the eye. Dark brown in the back side of the neck from the middle of the neck This section is black in the sub-country. The trail is unusual little. The front part of the throat is gray. The ends of the body and the upper part of the tail are bloated and gray-brown. The lower part of the body is light brown. Eyelashes of eye iris, brown, reddish-brown, gorgeous red or yellow Other than the breeding season, the lip face is black, the lower part is yellow. The lips of the sub-species are completely black. But the small part of the lips of the lips is always yellow or white. There is a white or yellow part in front of the lips and in front of the lip. The legs are long and dark greenish colors. The legs are not like other aquatic birds. Located in the rear of the body. The position and structure of the feet are suitable for swimming and diving in water, which is why the diver is very difficult to move around. But rarely land on the shore. [2] [5]
Winter structure
In winter the darker parts of the body are darker. The front part of the throat and the cheek turns brown in red. The fumes of the body contain light brown clips. The white or yellow part of the lip tooth is larger and more clear. A black part is seen below the lip. At the end of the winter, the color gradually started to fade. [2] [5]
Minor diver
Minor divers have fakes in color compared to adults. Their lips are completely yellow. As the age progresses, the lips become blackish. There is also a light white-black stripe on both sides of the neck. [2] [5]
Subdivision
Based on the body's size and size, the total number of divers is 9
Sub-species have been identified. [6] They are:
- T. r ruficollis (Pallas, 1764): Their main residence is from Eastern Europe to the Ural Mountains and to the northwest
Africa - T. r. iraquensis (Ticehurst, 1923): Iraq and southwestern Iran.
- T. r. capensis (Salvadori, 1884): southern part of the Sahara Desert, Madagascar,
From the Caucasus to India, Sri Lanka,
The main abode of Bangladesh and Myanmar is Bangladesh. - T. r. poggei (Reichenow, 1902): Their main residence is South-East and Northeast Asia, Hainan Province of China,
South of Japan, Taiwan and the Coral Islands. - T. r philippensis (Bonnaterre, 1791): Their main residence is North Philippine.
- T. r. cotobato (Rand, 1948): Mindanao, South Philippines.
- T. r. tricolor (G. R. Gray, 1861):
From Sulawesi to Serum Island, North
New Guinea, from Lamb to Timor, their main abode. - T. r. volcanorum (Rensch, 1929): from Java to Timor. There is little doubt about this sub-species.
- T. r. collaris (Mayr, 1945): From northeast New Guinea to Solomon Islands, it can be seen.
However, another species Tachybaptus tricolor has been proposed to break the Tachybaptus ruficollis in 2010. The foundation of the creation of new species is that their relatively big lips and more deep lower However, the proposals of this new species were not supported everywhere.**#
