Cattle Egret(Bubulcus ibis)

The first bird photo with my Christmas present. The bird is a Cattle Egret, my present is a Sigma 1.4x teleconverter which makes my lens (in FX, full frame)an 850mm! I'm hoping that I can now take photographs of those birds that I never normally can get anywhere near! I'm hopeful anyway. The birds in question are Crab Plovers and the like!