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Most bird species inhabiting mangroves are considered visitors to the habitat. However, some species feed or reproduce almost exclusively in mangroves. If most are visitors, then the question arises as to whether bird communities characteristic of mangroves actually exist. Similarly, the influence of adjacent vegetation types on avifaunal composition in mangroves remains unassessed. In this study, I address these questions, providing fundamental information regarding the avifaunas of New World mangroves. I surveyed avifaunas at nine sites in Mexico and El Salvador. Mangroves were traversed principally by canoe, and on foot when possible. For each area, species presence, type of vegetation, and use of mangroves for perching, nesting, rearing young, or feeding were recorded. Three principal methods were used to complete inventories of th...
The Chimalapas region, in eastern Oaxaca, Mexico, holds lowland rainforests, tropical dry forests, and cloud forests typical of the Neotropics, as well as montane pine and pine-oak forests more typical of the Nearctic. Totaling more than 600,000 ha, much of the region is forested, and in a good state of preservation. The Chimalapas avifauna is by far the most diverse for any region of comparable size in the country, totalling at least 464 species in the region as a whole (with more than 300 species in the lowland rainforest) representing 44% of the bird species known from Mexico. Within the region, the humid Atlantic lowlands hold 317 species, the montane regions 113 species, and the southern dry forested lowlands 216 species. Important species present in the region include Harpy Eagle Harpia harpyja and several other large eagles, Bla...
Cracids are among the most vulnerable groups of Neotropical birds. Almost half of the species of this family are included in a conservation risk category. Twelve taxa occur in Mexico, six of which are considered at risk at national level and two are globally endangered. Therefore, it is imperative that high quality, comprehensive, and high-resolution spatial data on the occurrence of these taxa are made available as a valuable tool in the process of defining appropriate management strategies for conservation at a local and global level. We constructed the CracidMex1 database by collating global records of all cracid taxa that occur in Mexico from available electronic databases, museum specimens, publications, “grey literature”, and unpublished records. We generated a database with 23,896 clean, validated, and standardized geographic re...
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