A parasite-prone peacock, for example, is more likely to be discovered by a discerning peahen because parasite infestation demonstrates itself as damage to plumage (which is more noticeable given the peacock's bright coloration).
An appraisal is a judgment of something, especially an estimate of how much it's worth. Usually you need an expert to give an official appraisal. If you were selling a house, you'd need an expert in real estate to give an appraisal of how much it's worth â that's an official estimate of how much you could sell it for. But this word can also be used in other less formal situations that call for a judgment or opinion of some sort.
appraisal - a document appraising the value of something (as for insurance or taxation) estimation, estimate. commercial document, commercial instrument - a document of or relating to commerce. overappraisal, overestimate, overestimation, overvaluation - an appraisal that is too high.