warbler. The Iago sparrow is not very shy toward humans, allowing them to approach, even while it is at its nest. Birds on the isolated and uninhabited island of Raso will even perch on human visitors with little fear. Because of the scarcity of water to drink in its habitat, it has a strong attraction to sources of water, and large flocks may congregate when humans provide water it can drink. It often is seen dust bathing in small groups, a behavior necessary to keep clean with a paucity of water. The adult Iago sparrow feeds mainly on the seeds of grass and grain (the main cereal crop grown in Cape Verde is maize), but also on insects and plant shoots. They can do damage to crops by eating young leaves, and like house sparrows will eat the food scraps available near houses. Nestlings, by contrast to adults, are fed almost exclusively on insects, especially caterpillars, flies, and orthopterans. The Iago sparrow forages mostly on the ground, moving restlessly whilst clinging to the ground like a mouse. Breeding The breeding season generally begins in August and September with the onset of the humid season, but the climate during a particular year may change the timing of breeding. On Cima, W. R. P. Bourne observed females remaining in flocks while males began to take up locations on rocky slopes from which they could sing. The breeding season is typically long enough that some pairs may be fledging young before others even start to build a nest; the greatest number of pairs breed when rains come, in October to November. Unmated males attract females by calling out beside a prospective nest site. When approached by a female, the displaying male will increase the intensity of his calls and hop around her while crouching with chestnut rump- and shoulder-feathers exposed. The male begins building the nest, but once a pair is formed both birds of the pair participate in the nest's construction and remain close together. Copulation occurs after the nest has been constructed, while the female is dominant in the pair for a time. The male invites the female to copulate by giving the crouching courtship display, and after ignoring and pecking at him initially, the female solicits copulation by crouching herself. When four vagrants were in the Netherlands in May 2013, a male was seen mounting a second male, apparently after