Tens of thousands of sandhill cranes stop in the San Luis Valley of southern Colorado every March on their annual trek from Texas to Canada. Bird watchers are also treated to glimpses of the endangered whooping cranes, which travel with the sandhill flock.

The small city of Monte Vista, 17 miles northwest of Alamosa, celebrates the migration of these birds with a Crane Festival, which this year will be held on the weekend of March 16 and 17.Festival events will include bus tours to the Monte Vista Wildlife Refuge, six miles south of town, to which the birds flock, and other local sites. Bus passengers make a donation to the refuge for the tours, which are escorted by state Division of Wildlife personnel. Prices for tickets to a luncheon and a dinner with speakers about wildlife are still to be set. The festival also includes arts and crafts exhibits in Monte Vista, which is on the Rio Grande and near the Rio Grande National Forest.

Information about the festival is available by calling (719) 852-2731; reservations for the events, (719) 852-4382.

***

Thailand, Malaysia, Indonesia and Tanzania are among countries cited by the State Department in travel advisories warning of the increased threat of possible terrorist actions against Americans as a result of the Persian Gulf war.

On Thailand, the department says a credible threat to American and other foreign organizations was received in Bangkok.

"The threat of terrorist acts in Southeast Asia is likely to continue for some time," the advisory said.

The advisory on Indonesia said an explosive device was found Jan. 18 in the American Ambassador's residence in Jakarta, and other Americans have received threatening calls.

The department's report on Malaysia refers to the discovery on Jan. 25 of a bomb in a ticket office in Kuala Lumpur that was exploded by police.

In Tanzania, the department says, there has been a credible threat against American officials; it has ordered the departure of nonessential personnel from the U.S. Embassy in Dar es Salaam and advises American residents to leave the country. It urges Americans to defer all nonessential travel to Tanzania.

A warning to travelers to exercise caution in Zaire does not mention the gulf war but says political developments and economic conditions have increased the possibility of public disorder. Travelers, an advisory said, should avoid areas where demonstrations may take place.

The inquiry number (202-647-5225) for the State Department's citizen emergency center, which lists current travel advisories, is now connected to 24 lines instead of the usual 18 because of the volume of calls. The department's crisis center (202-647-0900), with 55 lines, is handling advisory calls as well.