Lydia Adamson: Beware the Laughing Gull (USA 1998)

From the Publisher:
Amateur sleuth Lucy Wayles and her bird-watching group are surprised by the sudden announcement that one of their members is planning to get married after their morning session of birding. But before the bride can say I do, she's shot down during the ceremony. When the police are unable to find the killer, Lucy hatches a plan to trap the killer herself!

Lydia Adamson: Beware the Laughing Gull. A Lucy Wayles Mystery. Signet, ISBN: 0451195981 (July, 1998), 240 p., $5.99.