At the tail end of the snowy plover breeding season, Point Reyes National Seashore ecologists have good news to report. The last month was the most productive of the summer: Park staffers announced the appearance of two broods near Abbotts Lagoon that had hatched from nests they didn’t know about. It could signify that the initial count of 32 nests this summer, down from 39 last year, was low. Within a few weeks, the breeding…