I love those mixed cloud sky shots. They can add a lot of "feel" to the photograph. maybe the birds left for better head pickens, not enough tourist and little tikes to take bites out of. Or someone at one point bought a lot of pigs in and the pigs ate all the eggs. They use pigs to control the nesting population at the lake Hood seaplane base and Air Strip in Anchorage. (they used to like nesting on the small island)
There was a walking area we didn't go to, maybe that's the breeding grounds. The only thing I can remember is the dive-bombing birds, it must have been traumatic!