I was out at Cedar Key last week on that windiest, coldest day of our little cold snap. The highs that day stayed in the low to mid 40's and strong steady winds made it feel a lot cooler. The temperature wasn't the only thing that was low. The tide had "left the building", pushed out by following winds that emptied the marsh of water.
I was cozy in my 20 year old NPS Northface parka and vest, but most of the birds looked pretty uncomfortable. For one thing, there just weren't any visible LGB types around. I think the wind was too much for them and they were hunkered down in the woods.
The easiest birds to find were the waders and waterfowl. There was a lot of bill tucking going on. The blue heron sheltering in the mangroves had his bill tucked away for warmth and a good sheltered spot. I lingered in that area for a while and even came back later, but he had not moved.
Out on the cold water, rafts of scaup were alternately resting and feeding. Lots of bills tucked in there too.
They get a separate post.