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Evolution__3rd_Edition

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Plate 4<br />

(a) Geospiza magnirostris on Daphne, Galápagos Islands. (b) G. fortis, also on Daphne. These two species are closely related, although G. magnirostris has a larger beak and is more efficient at<br />

eating larger seeds. (c) The crater on Daphne in the normal weather conditions of 1976. The birds in the foreground are boobies. (d) The same crater on Daphne in the El Niño year of 1983.<br />

The distinctive vegetation consists mainly of Heliotropium angiospermum and Cacabus miersii. (See Sections 9.1, p. 223, and 13.7.3, p. 373.) (Photos courtesy of Peter Grant (a–c) and Nicola<br />

Grant (d).)

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