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This paper is an overview of the studies on raptors (Falconiformes, Strigiformes, and Cathartidae) that are in course and have been done in México. A questionnaire was sent to researchers and ornithologists to collect consistent information on the studies they have done in México with raptors. We received responses from 18 researchers that have worked in 16 states of México and also added information of researchers and institutions that we were certain studied raptors, but did not submit a response. Studies occurred in 22 states. Researchers working with Mexican raptors have positions at 26 institutions. Baja California Sur, Durango, Sonora, and Jalisco reported more studies from the 1980s to 1999 than the other states. There are no studies underway in Campeche, Distrito Federal, Guerrero, Hidalgo, Puebla, Quintana Roo, Tabasco, Tlaxcala, and Yucatán. With the exception of Veracruz and Tamaulipas, there are no current studies in the states of México that contain the highest richness of raptor species nor the most rare or specialized species (Tabasco, Guerrero, Puebla, Hidalgo, Campeche, Quintana Roo, and Yucatán). Most recent research study patterns of distribution, breeding biology, trophic ecology, and general ecology. Studies have been made mainly in xerophytic scrub, oak-pine forests, grasslands, and tropical deciduous forests. Of special concern is the small number of studies or the lack of them, in tropical rainforests, thorn forests, marshes, and mangroves. Osprey (Pandion haliaetus), golden eagle (Aquila chrysaetos), peregrine falcon (Falco peregrinus), burrowing owl (Athene cunicularia), aplomado falcon (Falco femoralis) and bald eagle (Haliaeetus leucocephalus) were species receiving more attention. Although the number of raptor species in México is high, only a few species have been studied. Remarkably, almost no studies with owls are currently underway, in spite of the number and diversity of owl species in México. Most studies are less than one year in duration or short-term. From species with no studies reported, 27 of the 33 Falconiformes and 20 of the 32 Strigiformes are included in the official Mexican list of threatened and endangered species (NOM-ECOL-059, 2001). It is clear that studies are lacking for Strigiformes (only 4 of 36 known species are receiving attention) and it is also clear that threatened, rare, and endangered raptors (Falconiformes and Strigiformes) need the most particular awareness. Studies are lacking in the states with the highest number of owl species, i.e. Oaxaca, Jalisco, Chiapas, Durango, Michoacán, Nayarit, and Veracruz.
Key Words: Raptor studies, Falconiformes, Strigiformes, questionnaire, México