Читать книгу A Manual of Philippine Birds - Richard C. McGregor - Страница 167

Bill strong and moderately long, terminating in a strong, sharp, overhanging hook or nail; nostrils impervious and tubular, opening forward or upward; feet moderate; toes webbed; hind toe small and elevated, rarely absent. Oceanic birds of strong flight and wandering habits; colors black, brown, and white. Eggs white, deposited in burrows or among piles of loose stone; young covered with down and fed for some time before leaving the nest.