Snowing heavily, dark outside, birds flying around??

Its 7.30pm and snowing heavily here up our 'mountain' in Wales. Opened the door to let dog out and a bird flew in. Landed on dog in doorway (great confusion!) and soared up to the rafters. Grabbed cat and threw it into another room followed by said dog. Bird fluttering around and ended up down at floor level behind furniture. Through still open door I saw more birds flying round farm yard area. Carefully caught said bird and took it outside, put it on top of a high fence in the lee of the old adjoining barn. Lots of birds still flying around so I turned off all outside lights when there seemed a lull in the activity. Did I do the right thing? What were they all doing at this time of night? Any suggestions? Sorry for the long post.
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Depending on what type of birds they were, perhaps a fox or an owl disturbed some roosting birds.