Looking for any insight from anyone that has done any first-hand work with the American Dipper/Water Ouzel (if there is not much pertinent info, would love an opportunity to look into it -- current stationed in WA state (SEA) & am an aspiring grad student).
As the Dipper is described as "inseparable" from streams, my impression is that it conducts most, if not all, of its foraging beneath water. In what percentage of these dives is the nictitating membrane in effect? What degree of transparency is there with this eyelid, particularly with an aquatic bird? Seeing as the Dipper is categorized as an indicator species, might its sensitivities be due in part to potential contaminants obstructing its already "compromised" vision? Is the above effect exacerbated in faster moving water, or the opposite? In essence, I am concerned with learning how much visual clarity is required for this bird to properly forage. (email @ [email protected])
