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A study conducted over 18 years in Costa Rica shows that small farms with natural landscape features such as shade trees, hedgerows and tracts of intact forest can provide a refuge for some tropical bird populations. Three-quarters of the species found in diversified farms showed stable or growing populations over the time of study. These include the collared aracari, a small toucan-like bird, with a yellow chest and enormous beak, as well as several members of the manakin family. But such habitat sanctuaries don’t offset overall population losses from the destruction of primary rainforests. The research was published Monday in the Proceedings of the National Academy of Sciences.

United statesStanford universityCosta ricaJames zookNicholas hendershotNatalia ocampo penuelaRuth bennettScience departmentHoward hughes medical institute scienceUniversity of california ocampo penuelaEducational media groupUniversity of californiaAssociated pressProceedings of the national academy sciencesSmithsonian migratory bird centerNational academy