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Cover image: Foraging hawkmoth. In southern Arizona, hawkmoths (Manduca sexta) have an innate odor preference to obtain nectar from jimsonweed (Datura wrightii) flowers. When jimsonweed is absent, hawkmoths learn to feed from agave flowers (Agave palmeri). See the article by Riffell et al. on pages 3404–3409. Image courtesy of Charles Hedgcock, RBP, FBCA (ARL Division of Neurobiology, University of Arizona).

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March 4, 2008; 105 (9)
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