Breeding seemingly had ended by early August, as evidenced by four adults that showed no gonadal activity and were in advanced stages of molt. [Please select]
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The breeding season is seemingly in June and July but there is indication of gonadal activity in males in October (MCT 3108). [Please select]
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The breeding season apparently was drawing to a close, for several adults in our collection were in postnuptial molt and showed marked gonadal regression. [Please select]
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Data on gonadal condition and brood patches of some of our specimens suggest that breeding occurs in coastal Tamaulipas, as previously reported by the Mexican Check-list (1950:110). [Please select]
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With the possible exception of a specimen of _Limosa fedoa_, none of the presumed nonbreeding, oversummering shorebirds collected by us showed gonadal enlargement above expected minimal sizes for the species. [Please select]
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Behle and Selander (1953) and Johnston (1956) have shown that nonbreeding first-, second-, and third-year California Gulls (_Larus californicus_) undergo gonadal enlargement in summer. [Please select]
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Additionally, nonbreeding first-year males of certain passerine species (for example, the Brown Jay, _Psilorhinus morio_; Selander, 1959) are known to experience partial gonadal recrudescence in summer. [Please select]
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It would be useful, and would facilitate discussion, to have data on gonadal condition of oversummering birds; any functional enlargement would be worth documenting. [Please select]
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