A THREE-DIMENSIONAL MODELING METHOD FOR QUANTITATIVE PHOTOACOUSTIC BREAST IMAGING WITH HANDHELD PROBE



Hummingbirds in high alpine habitats of the tropical Mexican mountains: new elevational records and ecological considerations

Most hummingbird species are distributed in tropical lowlands and mountains with few species reaching the alpine environments of high mountain peaks.Field surveys were conducted in nine alpine sites across four of the highest volcanoes in central Mexico for three years to document hummingbird occurrence, habitat use, and some aspects of behavior.We

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