The Rob Roy Glacier in New Zealand covers most of the headwalls encircling a valley  and during spring it melts causing small avalanches and bigger blocks of ice can tumble.
The Rob Roy Glacier is a small hanging glacier in the Southern Alps of New Zealand's South Island. The glacier covers most of the headwalls encircling the valley, except the eastern side where the bordering peaks are all just below 2,000 metres (6,600 ft). The spring melt causes frequent small avalanches, and seracs breaking off the glacier's terminal face on the northwestern side of the valley. Bigger blocks of ice can tumble and crash all the way to the valley floor. 
