WORTH NOTING ON TV

* SUNDAY

National Conference of Black Mayors (C-Span, 4-6:30 p.m., E.T.): "An Urban Report Card: Clinton's First 100 Days." Panelists include New York City Mayor David Dinkins, Cleveland Mayor Michael White, and Denver Mayor William Webb.

Nature (PBS, 8-9 p.m., E.T.): If you missed last year's "Realms of the Russian Bear," a unique look at wildlife across the former Soviet Union, here's another chance to catch it. Part 4 tonight, "The Celestial Mountains," looks at the peaks running along the border between the Central Asian republics and China, habitat for the snow leopard, the white-clawed bear, ibex, and Marco Polo sheep. George Paige and Nikolai Drozdov are co-hosts.

Ringo Starr: Going Home (Disney Channel, 9-10 p.m., E.T. and P.T.): The former Beatle drummer returns to Liverpool for a performance with his "All-Starr Band." Most interesting of all to Beatles fans, Ringo treks around the city, his father and a son in tow, to visit his old homes, schools, and the places where he and the Fab Four got their start. One comes away with a better feel for the milieu that spawned the early '60s "British invasion" in pop music. The All-Starr Band includes Timmy Capello, Burton

Cummings, Dave Edmunds, Nils Lofgren, Todd Rundgren, Timothy Schmit, Zak Starkey (another son of Ringo's), and Joe Walsh. Be advised: Ringo's singing voice is the same as ever.

Hawaii: Paradise in Peril (TBS, 10-11 p.m. E.T., repeats during the week): For most Americans, Hawaii is a vacationland of sandy beaches, golf courses, and the occasional volcano. But there is another side to the story. In this special, co-sponsored by TBS and the National Audubon Society, actor Richard Chamberlain explores the threat posed by uncontrolled development to the islands' unique ecology and to native Hawaiian culture. The show raises important issues, but would have been improved by a little less of Mr. Chamberlain, a longtime resident of Hawaii, and a little less preaching. The Audubon Society can do better.

Please check local listings for all programs.