Why some birds sing elaborate songs in the winter
Male great reed warblers may be practicing how to woo
![Marjorie Sorensen with birds in Zambia](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/02/020316_sm_bird-song_free.jpg?fit=860%2C460&ssl=1)
WHY SING IN WINTER Marjorie Sorensen, tracking bird movements in a seasonally flooded valley in Zambia (left), is studying why great reed warblers (one shown, right) overwintering there sing so much.
L-R: Jason Boyce, M. Sorensen