This project is being created by many CT & NY birders taking a "snapshot" count at a point in time, of "all" gulls and other birds in Long Island Sound (in CT and NY coastal LIS waters) on 2017 March 25 and April 9, and 2018 March 25. A dozen more blue count icons need to be added to map above to show our full coverage, including a few more points on NY side.
20170112
Tides
Here is one NOAA site where LIS tide cycles can be referenced...