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It has long been suggested that habitat structure affects how colonial birds are distributed within their nesting aggregations… Expand This study constitutes a first approach to evaluate the use of genetic information and relatedness estimators in the… Expand The influence of lagoons size and prey availability on the Ciconiiformes in the upper Parana river floodplain, Brazil, were… Expand Die systematische Stellung der Cathartidae ist umstritten. Vergleichende anatomisch-morphologische und ethologische… Expand One thousand two-hundred-four helminth samples recovered from Brazilian Ardeidae birds during 54 years were studied. Samples… Expand Ethological studies in the 1940s and 1950s, most notably those of Lorenz and Tinbergen, emphasized a historical perspective. By… Expand The fossil record of condors from the Upper Cenozoic of the Pampean region is rich and diverse. The declination, retraction in… Expand -FrOtn 1989-1992 at Lake Okeechobee, Florida, I followed 356 adult Great Egrets (Casmerodius albus), 236 Snowy Egrets (Egretta… Expand Sarcocysts were found in striated muscle of 21 adult wading birds among 145 examined grossly and 70 examined histologically… Expand