Best, A. T, Rooke, K. B, Oldham, C, Dent, G, Oldham, C & Rooke, K. B / July 1939 – vol. 33, issue 2–55 I THINK it will be of interest to record a case of bigamy in Montagu's Harrier (Circus pygargus), which I had under observation in England during the summer of 1938. It is well known that this species has a tendency to nest in small colonies, but I do not know whether cases of one male bird serving more than one hen have been recorded. I have heard of one possibly similar instance, which occurred ... This article is only available to registered users.To read more, please log in or purchase a subscription.