The avian world

At the Museum of Science exhibit ‘‘A Bird’s World,’’ kids crawl on their stomachs and walk in silence in a ‘‘Sneaking Corridor,’’ testing their ability to stalk a bird. Dozens of mounted birds in cases are grouped by habitat, showcasing their diverse sizes, colors, and shapes. A good introduction to bird behaviors is the free brochure (also downloadable from the museum website) ‘‘Watching Wildlife Through the Eyes of Birds.’’

And if winged flight is part of your fascination, don’t miss the incredible variety of colorful beauties flying free in the museum’s Butterfly Garden. You need to purchase a timed ticket for your brief visit to the almost tropically warm conservatory where electric blue, creamy yellow, red and black, polka-dot and tiger-striped butterflies and luna moths float through the air. Cameras are welcome.

Museum of Science, Science Park, 617-723-2500, www.mos.org. Winter hours: Saturday-Thursday 9 a.m.-5 p.m., Friday 9-9. Admission (plus Butterfly Garden add-on): adults $19 ($4.50), age 60 and over $17 ($4), ages 3-11 $16 ($3.50).