Akustische Abgrenzung der Taubenarten der Samoa-Inseln

Notes on the natural history, taxonomy, and conservation of the endemic avifauna of the Samoan Archipelago

“…Beichle (1991) was the first to accurately describe the voice of the Samoan Wood Pigeon and illustrate it with sonograms, and McPherson (1995) published the first sound recording (made by T. G. Lovegrove in 1982). The "song" (ML 139951) is a series of low coos, similar to, but slower paced (6/10 sec; Beichle and Baumann 2003) than the song of the Tongan Ground Dove Gallicolumba stairii (18/10 sec), and reminiscent of the hooting songs of fruit doves Ptilinopus spp. This song is unique within the vitiensis complex, and completely different from the variably syncopated, short burst of rather staccato hoots, whup!…”

“…They also fail to consider vocal similarities and clear evidence of possible unrestricted hybridization and gene flow. Beichle (1991), Beichle and Baumann (2003), and Hayes et al (2016) give detailed descriptions of the vocalizations in this complex. The three Polynesian taxa all utter a variable but always halting series of hooting notes hooo, hup-hoo, huphoo, hoo-hoo-hoo-hoo that often sounds like the bird is stuttering, or stopping then starting again.…”

“…Such appears to be the case in Samoa, where despite earlier authors' listing it as present on both Savai'i and Upolu (Mayr 1945, duPont 1976), it appears now to be absent from the larger islands. A population in central Upolu was studied in the 1980s (Beichle 1991, Beichle andBaumann 2003), but we know of no certain records for that island within the past decade. Thus, within the Samoan archipelago, the Tongan Ground Dove appears to be confined to Ofu-Olosega and the tiny island of Nu'utele off Upolu (Freifeld et al 2001).…”

“…Home to 32 indigenous land birds (Watling 2001), including five classified as globally threatened (BirdLife International 2014b), it is one of the richest areas for avian diversity in Polynesia, and an important priority for conservation efforts both regionally and globally. Several authors (Mayr 1945, duPont 1976, Pratt et al 1987, Watling 2001) have summarized the distribution and status of birds in the Samoan archipelago in a regional context and others (Amerson et al 1982a,b;Muse and Muse 1982;Goldin 2002;Beichle and Baumann 2003) have focused solely on the archipelago. Over a decade has passed since the most recent general review (Beichle and Baumann 2003), and that one offered little new information on American Samoa.…”

“…Several authors (Mayr 1945, duPont 1976, Pratt et al 1987, Watling 2001) have summarized the distribution and status of birds in the Samoan archipelago in a regional context and others (Amerson et al 1982a,b;Muse and Muse 1982;Goldin 2002;Beichle and Baumann 2003) have focused solely on the archipelago. Over a decade has passed since the most recent general review (Beichle and Baumann 2003), and that one offered little new information on American Samoa.…”