bˈeɪst ˌɔn dˈeɪɾə fɹʌm mˈoːɹ ðɐn wˈʌn hˈʌndɹɪd tɹænsˈɛkt sˈɜːveɪz wˌɪtʃ tˈʊk plˈeɪs bᵻtwˌiːn tˈuː θˈaʊzənd fˈoːɹ ænd tˈuː θˈaʊzənd nˈaɪn, ðə pˌɑːpjʊlˈeɪʃən ɪz ˈɛstᵻmˌeɪɾᵻd təbi dᵻklˈaɪnɪŋ.
Based on data from more than one hundred transect surveys which took place between 2004 and 2009, the population is estimated to be declining.