Amanda-River Mead, Kirsty Neller, Warren Horrod-Wilson and Thomas E. Dickins / December 2021 – vol. 114, issue 12, pp 766 On 17th June 2021, we witnessed an adult Kittiwake Rissa tridactyla expel a chick from its nesting ledge. The chick fell to its death. We made the observation during our annual monitoring of this species on Lundy. A scan of the colony at 12.13 hrs detected unusual movement in a two-chick nest. One chick, which we designated as the beta chick given its smaller size, was unusually position... This article is only available to registered users.To read more, please log in or purchase a subscription.