birding...

Common Noddy Anous stolidus © Tom Tarrant http://www.aviceda.org/

There are only 34 species of land birds, of which 14 are endemic, including such forms as the famous tooth-billed pigeon, fruit doves, kingfishers, and white-eye. So says one guide - but this refers to Samoa as a whole rather than just Western Samoa...

Samoa, officially the Independent State of Samoa (formerly known as Western Samoa), is a country governing the western part of the Samoan Islands archipelago in the South Pacific Ocean. It was admitted to the United Nations on 15 December 1976. The entire island group, inclusive of American Samoa, was known as Navigators Islands before the 20th century because of the Samoans' seafaring skills.

The country is located east of the international date line and south of the equator, about halfway between Hawai‘i and New Zealand in the Polynesian region of the Pacific Ocean. The total land area is 2934 km˛ (slightly smaller than the U.S. state of Rhode Island), consisting of the two large islands of Upolu and Savai'i which account for 99% of the total land area, and eight small islets: the three islets in the Apolima Strait (Manono Island, Apolima and Nu'ulopa), the four Aleipata Islands off the eastern end of Upolu (Nu'utele, Nu'ulua, Namua, and Fanuatapu), and Nu'usafe'e (less than 0.01 km˛ in area and about 1.4 km off the south coast of Upolu at the village of Vaovai). The main island of Upolu is home to nearly three-quarters of Samoa's population, and its capital city is Apia.

The climate is tropical, with an average annual temperature of 26.5 °C, and a rainy season from November to April. Savai'i is the largest of the Samoan islands and the third largest Polynesian Island after Tahiti and New Zealand. The population of Savali'i is 42,000 people.

The Samoan islands have been produced by volcanism, the source of which is a geologic hotspot which is the probable result of a mantle plume. While all of the islands have volcanic origins, only Savai'i has had recent eruptions and could be considered volcanically active. The last major eruption occurred in the 1700s, and smaller eruptions occurred between 1904–1906. The highest point in Samoa is Mauga Silisili, at 1858 m. The Saleaula Lava Fields were produced by Mt. Matavanu during its eruption 102 years ago leaving 52 square kilometres of solidified lava.