; and (B) relevant threatened and endangered species, which are primary indicators of ecosystem health. (c) Wildlife movements (1) In general The interagency team established under subsection (a) shall assess the potential for facilitating wildlife movement across or under major highways and rail lines within the biological corridors established under title II. (2) Requirement The assessment under paragraph (1) shall include an identification of major crossing points and practicable management actions to enhance the suitability of the crossing points as movement corridors, including underpasses, overpasses, and other methods for reducing the danger to native wildlife while facilitating movements within the Northern Rockies Bioregion. 503. Roadless land evaluation (a) Definition of roadless land In this section, the term roadless land means land that is— (1) greater than 1,000 acres in area; (2) located within the National Forest System in the Wild Rockies Bioregion in the State of Idaho, Montana, Oregon, Washington, or Wyoming; and (3) not designated as a component of the National Wilderness Preservation System under this Act or any other provision of law. (b) Evaluation (1) In general The panel of independent scientists described in section 501(1) shall— (A) subject to paragraph (2), identify and evaluate roadless land; (B) study the role of roadless land— (i) in maintaining biological diversity in the Northern Rockies; and (ii) as part of the overall Forest Reserve System; and (C) include in the report under section 501 recommendations regarding the management of roadless land. (2) Sources of information In identifying and evaluating roadless land under paragraph (1)(A), the panel shall use, in addition to other information sources, existing satellite information and geographic information system data developed by— (A) the Forest Service; (B) the Bureau of Land Management