By Dr. Pary Sivaraman.
These are my own personal observations on the 17th and 18th January 2018 at Marina East Drive. Similar observations on both dates and I was the only birder on both dates.
There was a group of about 10 to 12 Swinhoe’s or White faced Plovers, ssp. dealbatus. Some were in breeding plumage. Just beside them but as a separate group there were about 15 to 16 Kentish Plovers, Charadrius alexandrinus. Some were in breeding plumage. On the first date, the Kentish Plovers were closer to me. On the second date the White faced Plovers were closer to me.
Kentish Plover in breeding plumage.
The groups tolerated a certain distance between me and them.
When I moved closer they would start walking a few feet.
If I continued, they would fly but interestingly the group closer to me would fly off first.
On the first date, the Kentish Plovers flew off first but the White faced Plovers moved a couple steps further from me and stayed.
On the second date, the White faced Plovers behaved similarly. They were closer and flew off first. The Kentish Plovers didn’t fly off but moved a couple of steps further from me and stayed.
Swinhoe’s or White-faced Plover in breeding plumage.
I thought it was interesting since the White faced Plovers or Kentish Plovers seemed to stick together as a group. I must emphasize I didn’t move too quickly to them. I presume if I did all of them would have flown away.
I have attached the photos of the Kentish and White faced Plovers in breeding plumage.
I have taken more photos for my own understanding how the birds.