Some birding groups have held “Big Sit” events where participants gather in a birdy area and watch for any birds that fly, swim, or hop by in order to count them. A contest or a bird count tally might be included. Of course eBird users can also log in the tally for the specific location.
For less experienced birders, it’s a great way to join with more experienced birders to learn from them and see how the birds are identified and counted.
While it has similarities to the Christmas Bird Count, in this case the counters are stationary, so they can focus on watching the birds that move through an area. Many "Big Sit" counts are done during either spring or fall migrations.