nasal mites from birds of a guatemalan cloud forest (acarina: rhinonyssidae).a survey of the nasal mites from guatemalan cloud forest birds is reported. seventy-eight birds, representing 10 families and 18 species, were examined. prevalance of infection was 24%. two new species are described: sternostoma darlingi from mitrephanes phaeocercus (tyrannidae) and s. pencei from empidonax flavescens (tyrannidae). new host records are reported for s. pirangae from chlorospingus ophthalmicus (thraupidae), s. hutsoni from catharus dryas (turdidae), ptilonyssus sairae from chloros ...19846536265
evolutionary significance of geographic variation in a plumage-based foraging adaptation: an experimental test in the slate-throated redstart (myioborus miniatus).geographic variation in the plumage pattern of birds is widespread but poorly understood, and in very few cases has its evolutionary significance been investigated experimentally. neotropical warblers of the genus myioborus use their contrasting black-and-white plumage to flush insect prey during animated foraging displays. although previous experimental work has demonstrated that white plumage patches are critical to flush-pursuit foraging success, the amount of white in the plumage shows consi ...200616817547
modeling the flocking propensity of passerine birds in two neotropical habitats.we examined the importance of mixed-species flock abundance, individual bird home range size, foraging height, and foraging patch characteristics in predicting the propensity for five neotropical passerine bird species (slaty antwren, myrmotherula schisticolor; golden-crowned warbler, basileuterus culicivorus; slate-throated redstart, myioborus miniatus; wilson's warbler, wilsonia pusilla; and black-and-white warbler, mniotilta varia) to forage within flocks, rather than solitarily. we used stud ...200717375332
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