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La Mosqueta Pico Pala, Todirostrum cinereum, fue observada en dos oportunidades (11 de febrero de 2000 y 21 de marzo de 2001) en Puerto Iguazú, en el noroeste de la provincia de Misiones, Argentina. Se trata del primer registro en Argentina, el cual extiende ligeramente la distribución geográfica conocida de la especie. A Common Toddy-Flycatcher Todirostrum cinereum was seen twice at Puerto Iguazú, in the north-west of Misiones Province, Argentina, on 11 February 2001 and 21 March 2001. This is the first record of the species in Argentina, and it slightly extends its known geographical distribution.

In the breading season 1991-1992 a mixed water-bird colony of about 400 nests of Egretta thula. Casmerodius albus. Nycticorax nycticorax. Ardea cocoi and Anhinga anhinga appeared at Laguna Iberá, Corrientes Provinee, Argentina. It was unique for its type in the arca, Observations were carried out during two breeding seasons. The dominant species during the first season was E, thula (52.5 %ofthe nests) followed by C. albus, During the next season the colony expanded in area and in number ofnests (87 %). The dominant speeies was now C. albus, with 80,5 %of the nests and a growth of399 %. AII the remaining speeies declined, andN. nycticorax was apparently absent. Evaluation ofthe impaet ofhuman visitors on the eolony require further monitoring.

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