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 term appraisal generally implies a professional appraisal by an appraiser familiar with the type of property and its value in the given industry. Probate cases do not often require professional appraisals for cash assets, such as bank accounts, with easily determined cash values.