While searching the entire Central Park boat lake yesterday for Danny, I came across two new goose families.
They consist of two mated goose pairs and a total of four   newly hatched goslings --one couple with three babies and the other pair   with only one. 
But the new hatchlings seem more to add to the mystery of   this season's goose hatchlings in Central Park rather than answer it.    
Typically, a Canada goose lays from three to seven eggs with   the average being five or six.
For a pair to have only one gosling suggests that either most   eggs failed to hatch or there was high mortality in the goslings almost   immediately after hatching. Three hatchlings is also a fairly low number   suggesting some loss. (On this note, Greta at the CP Reservoir initially   laid six eggs. One egg failed to hatch and two goslings were lost within the   first ten days. Currently, three still survive.)
On the positive side, the presence of new goslings   appears to suggest that little if any egg addling (i.e. rendering goose eggs   unviable) was actually done in Central Park this season   as has occurred in the past. (That was a question recently raised in   light of recent high egg losses in CP this spring.)  
The two families were in close proximity to each other with no   strife or conflict. (This suggests that the two hens are likely related;   perhaps sisters. It's also likely that the hens themselves hatched in Central   Park and returned to the boat lake to start their own families with their mates.   Hens usually determine nesting sites.)  
It can be said that there is usually some safety in numbers.   For the four goslings to have two sets of goose parents looking after them   is a good thing (as well as the one lone hatchling to be exposed to other   goslings). Hopefully, they can grow up similar to siblings.    
The "bad news" in all this is that the two new goose   families are located in a very crowded area of Central Park (near Bow   Bridge) with much human activity around them.
There are tons of tourists, people in rowboats and   unfortunately, fishermen who are often careless in leaving fishing lines and   tackle around the lake. -- Things that can easily cause harm not only   to tiny, vulerable goslings, but also, adult birds. 
Yesterday, as the geese and their babies grazed in a grassy,   fenced in area, one young woman reached over the fencing to pet one of   the goslings like a kitten.
"You shouldn't do that," one woman corrected the girl. "They   need to remain wild and be protected from people. That's why the fencing is   here."  
The young woman then pointed to a fisherman who was casting   his line out to the water from inside the supposedly "off limits" area. He was   mere feet from the two goose families.
"What about him?" she asked. "I mean the babies no   harm!"
I then chipped in: "You may not mean harm to the animals, but   other people do. The baby geese need to learn to be wary."
Of course it is hard to explain to people that   they need to respect fenced-in protected areas when fishermen   obviously don't.  
With all the pressures and dangers around them, I am not at   all optimistic that all four of the new goose babies will ultimately survive.   (Already, their low numbers suggest some loss.) 
Matters are particularly precarious for the one lone gosling   without siblings. Perhaps this is the reason his/her parents have elected to   stay close to the family with three hatchlings. Goose parents will do everything   possible to protect their babies, but in Central Park, so much is out of their   control. -- Especially, the actions of humans whether well intentioned or   not.
Like everything else, much remains to be seen. Stay   tuned. -- PCA
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