Good advice from Geoff there most of the time I switch to aperture or shutter priority to be honest I will only use manual when I want to hold the exposure settings or shoot with flash.
Even at a reasonable time of day you do need to up the ISO a tad to get a decent shutter speed as I found last night when trying to grab a shot of a starling that was nesting in a neighbours roof, it proved trickier to capture that I thought:-
And the same bird tonight (not as sharp as last nights though but more bird in the frame):-
