Impending Rollover

In reading what milestones should be coming up for the little man it did say that around 4 months an infant could soon roll over.  That it typically happens around 4 - 6 months.  When they are on their bellies the test of whether they are soon ready to roll over is if they move about like they are trying to swim. 
Of course after reading this I just had to place Declan down on the floor on his belly to see what he would do.  He held his head and chest up proudly off the floor waved his little arms at his side and kicked his legs out behind him.  He's a little swimmer, rollover impending!