Read the field diary of pro explorer Jim McNeill, written during the expedition on Ellesmere Island in preparation for the filming of NATURE's "White Falcon, White Wolf."

Although this Arctic adventure has been fairly static in mileage terms compared to my normal expeditions, it has been a really tremendous journey for me in personal terms.

Just as we were giving up on the wolves, they turned up again.

Entering our final 10 days, we took stock of what material we had filmed and what we needed to capture, which we would concentrate on in the last few days.

Job description: Stay in one place, awake and alert, for the next 11-and-a-half hours to film something that may or may not occur.

Having lost the wolves again and there still not being any sign of pups or mother at the den, it was mooted that the "shape" of the programme might have to alter slightly.

Just as easily as they had vanished some seven-and-a-half days earlier, the wolves suddenly reappeared, apparently without a care in the world.

There was now real concern in the BBC camp regarding the wolves. They'd been gone for seven whole days and the majority of the crew felt that they were not necessarily coming back.

It was my turn to explore the outlying areas, and this time I thought I'd go north to try to get a view over the low-lying plains to the other side where another fiord comes in.

It was Jonny's day to do a bit of exploring and increase our knowledge of the locality, so he followed our tracks east.