Introduction
Birds are feathered bipeds. They belong to class Aves and subphylum Vertebrata. The most distinguishing character of birds is the possession of feathers and the forelimbs modified into wings. Birds descended 140 million years ago from the reptilian stock similar to that which produced dinosaurs, a bird-like creature, called Archaeopteryx.
General characteristics of bird
| 1 | Body covered by feather, air-breathing, warm-blooded, egg laying and bipedal flying vertebrates. |
| 2 | Body is more or less spindle-shaped and divisible into head, neck, trunk and tail. Head bears jaw bones prolonged into a toothless beak. Neck is long and flexible. Trunk is compact and tail is short and stumpy for balancing, steering and lift during flight. |
| 3 | They have one pair of legs and one pair of wings. Legs are large and are adapted for walking, running, scratching, perching, capturing food, swimming etc. |
| 4 | Wing bears three clawless digits and leg bears four clawed toes, of which the first or hallus is directed backwards. |
| 5 | Body is covered with feathers forming a non-conducting body covering for warmth and lightness of bodyweight. |
| 6 | The bones of birds are different to those of other animals. They have a hollow space inside the bone filled with air, which makes the body light so that birds can fly easily. |
| 7 | Gullet dilated into a crop for quick feeding and storage. Stomach is divided into a glandular proventriculus and a muscular gizzard. |
| 8 | Heart is four chambered. |
| 9 | Lungs are spongy and non-distensible. Air-sacs are present and some of them communicate with air cavities in the bones. |
| 10 | Vocal cord is absent in birds but they produce sound with the help of sound box (syrinx) present at or near the junction of trachea and bronchi. |
| 11 | Parental care is highly developed, ensuring safety of the eggs and young. |
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List of donors
- World Migratory Bird Day 2013 - Rs. 3300
- Rainor Stoll , birdingtours GmbH, Germany - Rs. 25,323
- Abinash Nepali , Germany - Rs. 1500
- Carolline Forell , USA - Rs. 150
- Charles Patton and Leslie Harris , USA - Rs. 150
- Toby Wheeler , USA - Rs. 330
- Rajendra Gurung (Patron, BCN) , Kapan - Rs. 2500
- Reliance Public School(Student from grade 3 to 5) , Kapan - Rs. 365
- Samir Maharjan - Rs. 500
- International Vulture Awareness Day 2011 - Rs. 2300
- Deepak Adhikari - Rs. 500
- Anand Chaudhary - Rs. 1275
- Dr. Hum Bahadur Gurung - Rs. 250
- Butch Lama - Rs. 700
- Sarah Piper - Rs. 2000
- Charles W. Norris Brown - Rs. 300
- Puja Gurung - Rs. 466
- Surya Prakash Tiwari - Rs. 200
- Ramesh K Pariyar - Rs. 500
- Golden Gate College - Rs. 77
- Shree Namuna Mahendra Sec. School - Rs. 902
- Bright Star Worker's Higher Secondary School - Rs. 510
- Shree Bolambu Secondary School - Rs. 1055
- Apollo Int'l School - Rs. 500
- Shree Chandi Bhairav Secondary School - Rs. 843
- Amar Jyoti Sec. School - Rs. 730
- Shree Chandrika Devi Secondary School - Rs. 501
- David Fiddell - Rs. 500
- Local people from Sikles Village , Kaski - Rs. 4223
- PABSON Programme , Surkhet - Rs. 3000
- Children's Paradise Boarding School , Surkhet - Rs. 2000
- Leknath Festival , Kaski - Rs. 2500
- Amar Singh High School , Pokhara - Rs. 1660
- United Academy , Pokhara - Rs. 1035
- Suryodaya Boarding School , Pokhara - Rs. 1000
- Narayanjan Secondary School , Mache Gaun - Rs. 891
- Shree Baghbhairav Secondary School , Kirtipur - Rs. 1035
- Green Village Education Foundation , Kirtipur - Rs. 500
- Program at Dhanding , test@test.com - Rs. 1500
- Evergreen Higher Secondary School , Sankhu - Rs. 1500
- Shree Bajrayogini Secondary School , Sankhu - Rs. 2800
- Serene Hill Secondary English School , Sankhu - Rs. 953
- Nuwakot Festival - Rs. 2000
- Exhibition (Climate Change) at Basantapur - Rs. 547
- BCN Day Celebration - Rs. 645
- 9th street exhibition and public awareness campaign - Rs. 766
