Bizquyruq

• The northern pintail male's beak is longer than 4.4 cm. Unlike other species, it is always longer than 4.4 cm.
• A small part of northern pintails winters in harsh conditions of Alaska and the Rocky Mountains, while some migrate more than 9000 km and winter in Hawaii. Some birds travel more than 9000 km to reach Hawaii.
• The northern pintail dives deeper than other river ducks due to its long neck. This allows it to forage food from the bottom of water bodies, tipping forward in the process.
• Male northern pintails form linear groups, as do many other duck species. These groups form in predetermined places with good protective conditions, such as large reed lakes, river mouths, and deltas.
• The maximum age of the northern pintail is 27 years 5 months, recorded in the Netherlands. In Alaska, young northern pintails begin to fly 35–42 days earlier than in other regions.
• The northern pintail forms large flocks only during migration, where hundreds or even thousands of ducks may gather on the fly. At other times, it does not form large flocks.