So the immature cormorant that Andy Lazere found in San Diego Creek the other day and that many people rushed over to see is still being considered as to its appropriate taxonomy. A panel of expert birders were consulted and there is disagreement on whether this should be considered a pure Neotropic Cormorant or a hybrid. Some of the salient field marks pointed out as an argument against a pure Neotropic Cormorant included the long bill length and the less-than-typical shape of the scapular feathers (i.e., they should be much more pointed than they were on that bird). The identification of this bird is still "up in the air."
However, Jeff Bray does have an adult Neotropic Cormorant sitting on the island in Pond 1 right now. I trust that nobody will be freaking swimming across the pond to get better looks at it.