The following companies specialise in tours for twitchers (bird-watchers).

Ibrahima specializes in tours that combine hiking with visits to hilltop villages.

There are a number of tour companies that specialize in Russian cultural tours, which include sightseeing as well as music.

But there are travel companies that specialise in organizing tours on specific subjects according to the needs of groups that approach them.

Travel agencies elsewhere on Bali that specialize in nature/active tours can make arrangements for hikers.

The company, which is based in Naperville, Ill., specializes in culinary vacations and tours.

Thirsty Swagman is a tour operator specializing in pub-themed tours.

Her company specializes in tours of Sri Lanka, and its bookings to the area have fallen 40 percent so far this year.

It's why we guides tend to specialize in tours through Just a handful of gates leading out of one terminal.

Mr. Quinn specializes in get-acquainted tours to remedy this kind of ignorance.