Jeffrey Kimball’s one-hour documentary about the birds and birders of Central Park was such a success at its premiere at the South by Southwest Film Festival in March of 2012 that HBO bought the rights to show it on television beginning in July. This evening offers a chance to watch it with other birders on a screen large enough to do justice to the close-up and unobstructed views of 116 species of birds, including twenty-two species of warblers, all of them in Central Park.