FIGURE 1 - uploaded by Timothy Brush
Content may be subject to copyright.
Map of the Lower Rio Grande Valley of Texas.  

Map of the Lower Rio Grande Valley of Texas.  

Context in source publication

Context 1
... breeding avifauna of the Lower Rio Grande Valley (LRGV) of southernmost Texas (Cameron, Hidalgo, Willacy, and Starr Counties; Fig. 1) contains a mixture of species of temperate and tropical distributions. Species at or near the northern limits of their breeding ranges include Plain Chachalaca (Ortalis vetula), Red-billed Pigeon (Patagioenas fl avirostris), and Altamira Oriole (Icterus gularis), while species at or near their southern range limits include Swainson's ...


... These foundational surveys helped establish a benchmark for avian diversity when the Texas frontier was opened. They also provided the benchmark for the next phase of Texas ornithology, which was comprised primarily of non-specimen-based distributional, species specific, ecological, and observational studies from the 1960s to present (Oberholser 1974;Brush and Cantu 1998;Benson and Arnold 2001;Arvin 2007;Rappole et al. 2007;Brush 2005Brush , 2008Ruth et al. 2008). ...
... Specimens provide an invaluable resource for researchers interested in topics such as biogeography, taxonomy, genomics, population dynamics, ecology, and conservation. There already has been a documented, northward expansion of subtropical species in Texas and there may be additional shifts in patterns of migration, both temporal and spatial (Rappole et al. 2007;Brush 2005Brush , 2008Lockwood and Freeman 2014;Lafleur et al. 2016). Systematic general collections of birds in the United States are rarely undertaken in the modern ornithological era. ...
... Other papers summarizing breeding birds along the Lower Rio Grande fail to mention the species (Dresser 1865-66;Merrill 1878;Person 1921;DeLaubenfels 1924;Friedmann 1924;Van Tyne 1933). Oberholser (1974) reported Summer Tanager as a rare nesting species in the Lower Valley, and there are only a few nesting records reported in modern era (Brush 2008). In recent decades, Summer ...
Full-text available
The avian diversity of Resaca de las Antonias, Cameron County, Texas is reported herein. The resaca is 3 km northeast of Los Fresnos and is 23 km north of Fort Brown, a historic center for ornithological exploration in the Lower Rio Grande Valley. This is the first systematic, specimen-based survey in the Lower Rio Grande Valley since the mid-1930s and helps establish a benchmark in the 21st century for extant species. Over a span of five years, 444 specimens were collected, representing 82 species of birds, and 182 species of birds were observed across all trips to the resaca. Of the 182 species recorded, 42 were confirmed breeding along the resaca from physiological evidence and observations. The species composition of resident and breeding species was found to be comparable with those recorded from collections prior to 1925. Similarly, with the few notable exceptions of Ringed Kingfisher (Megaceryle torquata), Tropical Kingbird (Tyrannus melancholicus), and Altamira Oriole (Icterus gularis), species of neotropical origins were similar in their breeding occurrence between the two time periods. Changes in avifauna were not directly compared between this survey and those of the 1860s–1930s because these results were restricted to one location in Cameron County and do not reflect broader regional patterns of distribution and species occurrences in the Lower Rio Grande Valley.
... Buteo albigula Gelain et al. 2001;Pavez et al. 2004;Trejo et al. 2004;Trejo et al. 2006a;Silva-Rodríguez et al. 2008;Henry & Aznar 2009;Rivas-Fuenzalida et al. 2015b. Buteo brachyurus Carvalho et al. 2001a;Jones 2002;Meyer , 2005Meyer & Zimmerman 2007;Rappole et al. 2007;Brush 2008;Flesch 2008;Rizkalla et al. 2009;Salvador-Jr. & Silva 2009;Howell 2010;Snyder et al. 2010;Enge et al. 2014;Oliveira et al. 2015;FWC [s.d.]. ...
Full-text available
Despite the key role that knowledge on breeding biology of Accipitriformes plays in their management and conservation, survey of the state-of-the-art and of information gaps spanning the entire Neotropics has not been done since 1995. We provide an updated classi cation of current knowledge about breeding biology of Neotropical Accipitridae and de ne the taxa that should be prioritized by future studies. We analyzed 440 publications produced since 1995 that reported breeding of 56 species. ere is a persistent scarcity, or complete absence, of information about the nests of eight species, and about breeding behavior of another ten. Among these species, the largest gap of breeding data refers to the former “Leucopternis” hawks. Although 66% of the 56 evaluated species had some improvement on knowledge about their breeding traits, research still focus disproportionately on a few regions and species, and the scarcity of breeding data on many South American Accipitridae persists. We noted that analysis of records from both a citizen science digital database and museum egg collections signi cantly increased breeding information on some species, relative to recent literature. We created four groups of priority species for breeding biology studies, based on knowledge gaps and threat categories at global level. Group I (great scarcity of information, plus higher categories of threat): Leptodon forbesi, Cryptoleucopteryx plumbea, and Buteogallus lacernulatus; Group II (breeding data have recently increased, but threat categories are high): Spizaetus isidori, Accipiter gundlachi, Buteogallus coronatus, Pseudastur occidentalis, and Buteo ventralis; Group III (“Near reatened” species with still scarce breeding information): Accipiter poliogaster, Accipiter collaris, Buteogallus aequinoctialis, and Pseudastur polionotus; and Group IV (other priority cases): Buteo ridgwayi, Buteo galapagoensis, four eagles (Morphnus guianensis, Harpia harpyja, Spizaetus ornatus and Buteogallus solitarius), Leptodon cayanensis, Accipiter superciliosus, Buteogallus schistaceus, and the three Leucopternis hawks (L. semiplumbeus, L. melanops and L. kuhli). We also discuss the way that novel breeding data can show in what manners di erent species and populations are responding to environmental changes.