The most tenacious of Piping Plover pairs has a second egg in their nest!
For the next few days you may see them on and off the nest. The pair won’t start brooding full time until all the eggs are laid. The reason being is that the hatchlings are precocial, which means active from birth. The parents want the chicks to hatch as closely together as possible so the tiny rockets zooming around the beach are more easily managed. The difference in a PiPl day old hatchling and a PiPl week old chick in human years is like trying to look after a newborn and a precocious preteen simultaneously.
Piping Plovers take about a week to complete the nest and lay all their eggs (sometimes two eggs or three or five, but most often four eggs). If they started brooding one egg full time, that egg would hatch a week earlier than the last egg laid, which would spell disaster for a precocial chick. Observing PiPl chicks that had hatched twenty-four hours apart was hard enough on the parents, let alone a week apart!
If you stop by to see the PiPls on the beach, please bear in mind they are working hard at completing their nest and laying eggs. Please don’t hover around the roped off areas or when you see the birds on the shore. Trust me, hovering attracts gulls and crows. Both species are smart and I’ve seen over and over again how human interest in the PiPls attracts these super predators to the nesting sites. Additionally, hovering around the adults off the nest stymies courtship and mating as well. Have a look with binoculars or take photo or two with a long lens and move on, especially when with more than one adult.
Thank you so much for your consideration!