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.
the act of estimating or judging the nature or value of something or someone. 2. an estimate of value, as for sale, assessment, or taxation; valuation. 3. an estimate or considered opinion of the nature, quality, importance, etc: the critics' appraisal of pop art; an incorrect appraisal of public opinion. Origin of appraisal.