Joann Jonasson January 14, 2019 Journal 2016-current Different prey resources suggest little competition between non-native frogs and insectivorous birds despite isotopic niche overlap. Joann Jonasson January 14, 2019 Journal 2016-current Smith, R.L., Beard, K.H. & Shiels, A.B. (2016) Biological Invasions, 1–13. Full text