Most difficult birding situation - optically
Apologies if this question has been asked already, but I'd like to ask what is the most difficult situation you regularly come up against in your day to day birding (or on a fairly regular basis) - glare from direct sun or reflected sunlight? Locating and picking out small/tiny targets in amongst foliage? Identification of subtle details at distance? Do you choose your binoculars with these challenges in mind, and have the difficulties you regularly face influenced you towards purchasing binoculars with particular optical qualities or specifications?
The answer in my case is both, but I'd love to hear other experiences and opinions.