Early Morning Grasshopper Warbler

My Cockerel had woke me early at 5:30 so I took a early morning drive over the hill to  Lickeen Lake to see if any Grassshopper warblers had arrived.
A dark damp morning I headed into the fields of tussock grass that i visit every year alongside the Ballymacken river and 4 birds were calling.
I believe the birds had arrived here over night with the partial eclipse of the moon as I heard none yesterday on a short visit ,They start a singing display as soon as they arrive,claiming there territory .