It was a wondrous sight just after sunset a few nights   ago.
As I was leaving the Central Park Reservoir, I heard   some faint honking. High in the sky above me, a skein of at least 20 geese   flew overhead. 
The geese were at least 300 to 400 feet in the air -- the   highest I had ever seen them flying over Central Park and certainly too high to   get a decent photo, especially in the dark. 
I thought at first the migratory geese were simply   passing over the park with some far off destination in mind. But as they   reached the center of the Reservoir, they began to circle  and   then rapidly descended to land gracefully in the water like accomplished   ballerinas. The geese had in fact, landed there many times before   -- the Reservoir either being their temporary, wintering home or   a temporary refuge when conditions are unusually harsh elsewhere.
Although general goose migrations passing through New York   City were later this year than usual (likely due to an unusually warm   summer and fall), the migratory geese who actually winter in New York City (and   are the last to fly in) arrived a bit early this year. Most of the   wintering Reservoir geese (and ducks) flew in over the past couple of   weeks. Typically they are not expected until late December or even early   January. 
The geese' and ducks' early arrival was excellent predictor   that weather was about to drastically turn frigid. An "Arctic Blast" has,   in fact, enveloped much of the country over the past two weeks with much   snow dumped in the north east and mid west and below zero   temperatures occurring in some states. It is suspected that the   unusually frigid weather in many parts of the country may have pushed some   birds into New York City who do not normally winter   here.  
In New York City, we have merely experienced a small taste of   the winter ahead. A few inches of snow fell several days ago, but   it was quickly melted by a temporary warm-up and rain.   
Nevertheless, all of Central Park's lakes and ponds are   currently iced over. Probably because it's deeper than other watercourses, the   Reservoir remains open water thereby attracting hundreds of migratory waterfowl.   
It is pleasing to note that the numbers of geese,   mallards, diving ducks and even American Coots at the Reservoir now are   comparable to numbers observed over the past several years. There are presently   at least 300 geese and mallards, scores of Northern Shovelers and even a greater   number of coots than one might typically expect to see.
But many of the birds will leave as soon as conditions   stablelize elsewhere or as we move deeper into the winter. 
Normally, during January and February (when parts or even most   of the Reservoir ices over) there remain only about 100 geese and maybe 150   mallards who elect to "toughen it out" in one of the world's most prestigious   parks as virtually all of the diving ducks and coots are forced to find   open waters. 
For all of its amenities and otherwise comforts, New York   City can be challenging for waterbirds during a particularly harsh winter   as virtually all of our lakes and ponds ice over. 
We may not get the winds, cold and snow of Buffalo, but we are   after all, still New York. -- PCA
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