Meanwhile, the 2005 cohort of juveniles for the eastern whooping crane flock, who were led by ultralight on their first southbound migration last fall, have started back north on their own. Follow the news of their progress at Journey North. Pick up a glimpse of National Geographic's Crane Cam on the North Platte River while you're thinking birds. (They get a LOT more sandhill cranes than we do in the winters at Bosque del Apache, though it's the end of their season and the crances there, too, have mostly moved north.)
A friend has pointed out that there is a Google Mars. We knew about Google Moon; Mars was a surprise. The Cassini-Huygens probe team has images of small moonlets embedded in Saturn's rings (summary and article citations at Nature, but not full text), and is gearing up for a fly-by of Titan at the end of April.
We found a new drought graphic, a River Basin Snow Water Content map covering the whole west; earlier in the month there were news stories from the earliest universe (data courtesy of NASA's WMAP probe); and for a small silly treat, listen to a bullfrog at FrogWatch.com