J. F.  Freile and Chaves, J. A., ?Interesting distributional records and notes on the biology of bird species from a cloud forest reserve in north-west Ecuador?, Bulletin of the British Ornithologists? Club, vol. 124, pp. 6-16, 2004.

J. F.  Freile, ?Range extensions and other notewothy and new bird records from mainland Ecuador?, Bulletin of the British Ornithologists? Club, vol. 124, pp. 188-202, 2004.