Holmes, R. 1963 12. C. alpina 19 Jun Danny Heuble scrappy display. First the♂ scuffed ink the up & high turning with his breast pursed & the north / the up of the white under-tail coverts being very conspicuous - the♀ walked (almost a run) towards him, he stopped out 1 place & she stepped in & began rotating. The♂ stood about 3" away with no speed gesture. Both then took flight - the♂ gave 3 turns & a stiff beating wrigg + an out-his-wing at a sharp V, slid 20', giving the loud rising trill. (The bird was flying low - over maybe 6' above ground). The♀ followed behind the♂ & as he finished his roll & landed, she let her wings in a V & flew to a tree - which was not a long way from the same great quality. Then, 9.9 mg fur sample same over as the♂ - However, I have never seen for collection. I - a known flight display. One other pair located to east 1 beachside, 10" and no live patch was collected.