The Laysan albatross can fly enormous distances (in one case 25,000 miles [40,000 km] in just 90 days). The blackpoll warbler makes the trip from North to South America, staying aloft for over 80 hours nonstop.
आकाशाविषयी विचार करताना दाविदाप्रमाणेच आपल्यालाही कसे वाटले पाहिजे? १६, १७.