Long-term monitoring reveals an avian species credit in secondary forest patches of Costa Rica.

Species preferring primary forest exhibited a positive trend (slope = 0.045, SE = 0.02, p = 0.026) while species preferring secondary forest exhibited a marginal decline (slope = −0.041, SE = 0.024, p = 0.074).

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Another 19 resident species showed marginally significant population trends ( Table 4 ; Appendix S8 ).

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Only one species (Variable Seedeater) showed a highly significant negative trend, and that species is an omnivore typical of scrub and edge habitat.

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