Black-fronted Dotterels maintaining egg temperature
The Black-fronted Dotterel breeds throughout the year around Broome and usually close to fresh water. Although I have written about this small resident shorebird breeding in the past I have now been able to obtain photographs of it maintaining egg temperature on very hot and dry days. We always stop in at Ellendale dam when we travel north, because it offers such a great variety of bird-life. On a recent visit we were just getting out of our vehicle and I noticed a pair of Black-fronted Dotterel swimming! I immediately thought of the Pied Oystercatchers along Broome’s coast that go into the sea and get their breast feathers wet to then return to their eggs to keep the temperature at a suitable level.
Black-fronted Dotterel filling its breast feathers with water
We sat down and only a few moments later one of the pair of Black-fronted Dotterels walked towards us and hovered over two eggs! The nest was not easily observed among the rocks and could have easily been overlooked without the bird hovering above the two eggs.
Black-fronted Dotterel hovering over two eggs
We continued on with our lunch and as time when went by the Black-fronted Dotterel then lowered its body on top of the eggs to maintain the desired temperature.
Black-fronted Dotterel sitting on two eggs
Returning to Ellendale dam seventeen days later, when it was not as hot and dry we realised that the egg cooling had been rather more than just maintaining the temperature on that hot and dry day. A third egg had in fact been laid since our previous visit and the adults were now able to feed and leave the nest on occasion.
Black-fronted Dotterel nest
Hopefully by now there are three fluffy Black-fronted Dotterel chicks at Ellendale dam!