Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
46
Anseriformes
Oct. 27-Nov. 4, Patahaya, 40 km. SE Impalme, 100 feet, Sonora.
Anser albifrons.- But one record available from Sonora (van Rossem, 1945:44). Nine noted on laguna on Oct. 29; these plus six others present early on Oct. 30, after which date they were not observed. Two visited the laguna briefly on Nov. 3.
Anas platyrhynchos.- One taken on laguna on but known earlier. This is apparently earlier than any previous record (van Rossem, 1945:48).
Anas cyanoptera.- Not noteworthy.
Anas carolinensis.- Not noteworthy.
Anas acuta.- Not noteworthy.
Mareca americana.- Not noteworthy.
Chauleasmus streperus.- Not noteworthy.
Spatula clypeata.- Not noteworthy.
Nyroca americana.- " "
Nyroca affinis.- Noted earlier on ' than previously recorded from Sonora (van Rossem, 1945:49).
Oxyura jamaicensis.- But three records are available authentic individual from Sonora (van Rossem, 1945:51). One observed on laguna on Oct. 30 and Nov. 1;
Nyroca valsiniera.- Previously unrecorded from Sonora.