The question is what tool besides an HCP might work to induce proactive measures to protect endangered species on private property. The scheme would need to respect landowner privacy, acknowledge their prior stewardship efforts, and allow some flexibility in how they protect their investments. This big sticking item is compensation. Compensation for landowners has supporters and critics from both sides of the debate. A tool that might bring both sides together could be to create a market for critical habitat.
Markets allow for both collaboration and privacy.
While we might not be sitting across the table, a market exchange still implies a consensus. You want to buy habitat, I want to sell it. Landowners can be provided the opportunity to sell private shares of critical habitat rights on the open market without opening themselves up to public access. Sabel, Fung, and Karkkainen discount market-based solutions because they require too much information. This is a good point.