Although surveys before 2002 failed to record the species, it is common in some places.

What the survey failed to articulate was that for the most part, the state's 544 miles of highways are in decent shape.

A 1996 survey that sought to determine whether the species still existed in the area failed to find any examples.

The bureau has acknowledged that its surveys fail to count some people.

The most recent surveys failed to find this species in the Tennessee portion of the drainage.

Recent surveys have failed to find any wild individuals.

Several unconfirmed reports occurred between 1996 and 1998 but a survey undertaken in 2000 failed to find any individuals.

The survey failed to note whether they did so under protest.

While another survey in 2009 failed to find the species, there is some hope that it may still persist.

It is suspected that its range may be larger than currently known, but so far surveys have failed to confirm this.