Abstract
I studied the diving behavior of Teal Anas crecca in the Nishi River of Wakayama Prefecture, which is located in western Japan. As part of a larger study of Teal populations in the river, which was conducted from October 6th, 2010, to May 31st, 2015, the diving behavior was observed from January to February in 2011 and from October to November in 2014. The percentage of teal observed diving was 1.8% (405 individuals) of the total number of individuals observed (n=22,592 teal). There was no relationship between sex and occurrence of diving behavior. The diving duration was 3 to 6 seconds / dive. The teal appeared to dive for feeding, because the teal that dove were observed to consume algae after they had surfaced.
