It used to be prolific around Cooktown but is now rare in the wild, due to over-collecting by commercial collectors.

"You haven't signed on with a commercial collector?"

It is targeted by commercial collectors who harvest it for export.

New excavations were started two years ago by Kirby Siber, a commercial collector from Switzerland.

When I was commissioner, we saw that commercial collectors used the telephone effectively to collect debts, and we switched to phones, profitably.

The hour ends on an upbeat note with an example of cooperation between commercial collectors and researchers.

It would open those lands to the gain of commercial collectors at the expense of science and education.

The similar Boletus regineus (the Queen bolete) is widely collected by both amateur and commercial collectors in California.

Dr. Ostrom defended commercial collectors who preserve scientifically important fossils for the use of scientists.

Both the commercial collectors and academic paleontologists need fossils, and there's nothing wrong with commercial collectors making an honest buck.