Apologies to the audience. I mis-spoke in saying Snowy Plover chicks were “altricial”. In fact, they are “precocial” in the terminology of most biologists. For details, see https://web.stanford.edu/group/stanfordbirds/text/essays/Precocial_and_Altricial.html
This is to say that Snowy Plover chicks are born required to, and able, to find food on their own, and not dependent on feeding by their parent.
Even though I said chicks were required to find their own food, I quoted the opposite term. I apologize for the confusion.

LucienP