बत्तखें गीली क्यों नहीं होती : ऑगस्टा द्वारा मुफ्त हिंदी पीडीऍफ पुस्तक | Battkhen Gili Kyun Nhi Hoti : by Augusta Free Hindi PDF Book
Pustak Ka Vivaran : Apani chaudi chonch se battakh, un tel-granthiyon ko chatati hai. Phir vo us tel ko apane sare pankhon par Ragadati hai. Chonch se pankh sanvarane ko “Preening” kahate hain…….
Description about eBook : The duck licks those oil glands with its broad beak. Then she rubs that oil all over her wings. Grooming the feathers with the beak is called “preening”…….
