Nuthatches are found around the world and their gravity-defying, tree-clinging activity can be fascinating to watch. To scale trees, hang upside-down, and descend head-first, they rely on strong legs and curved nails to securely grip tree trunks.
Nuthatches in North America are usually permanent rather than migratory visitors. However, large numbers of birds are known to suddenly and dramatically head south when winter food supplies are low, an event called an irruption. Winter seems far away during these warm summer days, but it’s the pinecones and seeds being produced right now that will determine whether an upcoming winter food shortage will spur an irruption.
Scientists studying nuthatch irruptions have learned that they can occur with some regularity and there are often negative population consequences resulting from these mass bird movements.
Catching a glimpse of unexpected winter birds in your yard can be exciting, so check the upcoming winter irruption forecast, or connect with a local birding group to monitor whether new birds are landing in your area. And check your Haikubox for alerts!