Our neighborhood Sandhill colts are now approximately 60+ days old and we've witnessed them taking short flights. We live at the south end of a cul-de-sac and these colts, being carefully watched by their parents, are now taking flight right from the end of the street in front of our house and flying about 1/2 way up the block to the north where a neighbor has a pair of metal Sandhill figurines in his front yard where they're landing. They then are taking off from there and flying back down the street to the end of the cul-de-sac. I would guess that within the next couple of days they'll be graduating to full flight training.
Here's a YOUTUBE video depicting what we've been witnessing the past couple of weeks around here. I of course, didn't do the video, but a lady named Nina Faust did a very nice job of chronicling young Sandhills learning to fly near Homer, Alaska in this video.
https://www.youtube.com/watch?v=7hf8Yzu17o8