Egg of the Great Black Hawk, Buteogallus Urubitinga Ridgwayi

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Egg of the Great Black Hawk, Buteogallus Urubitinga Ridgwayi

SHORT COMMUNICATIONS 515 Egg of the Great Black Hawk, Buteogallus urubitinga ridgzuayi.-An egg ready for laying was obtained from the oviduct of a Great Black Hawk collected at noon on 17 February 1953 at about 5000 feet above sea level near El Volcln in the Province of Chiriqui in western PanamB. The measurements were 59 x 47.5 mm. It was slightly ovate in shape, and dull white with scattered, tiny, irregular, brownish specks. I know of no published record of the egg of the Middle American race. These measurements are within the range of those of the nominate race of South America. An egg of the latter race, from Trinidad, was said to be rather heavily spotted with red-brown. The only previous report known to me bearing on the nesting season of ridgwayi is of a nest found on 14 April 1949 in the Sierra de Tamaulipas, Mexico, with copulation observed in early June, and a family group of four noted the following year in early August (Martin, Robins, and Heed, Wilson Bull., 66:45, 1954). It would seem that in Panama the species may nest earlier.--FRANK A. HARTMAN, Department of Physiology, Ohio Stete University, Colum- bus, Ohio, 24 January 1966. A Record of Stingray Predation by the Brown Pelican.-Examination of the pouch contents of a freshly dead Brown Pelican (Pelecanus occident&) yielded noteworthy data con- cerning the little-known food habits of the species. The pelican was found on the beach 10 December 1965, 16 miles south of San Felipe, on the Gulf of California, Baja California, Mexico. The bird showed no sign of physical violence; there were no broken bones, the feathers were intact, and there was no evidence of internal bleeding. The distended throat pouch contained five fish of the stingray (Dasyatidae) and tonguefish (Cynoglossidae) families. The latter family was represented by one individual of the genus Figure 1. Pelecanus occidentalis with pouch cut open to show the relative position of the stingray, Urolrygon aster&. The ray’s body is slightly anterior to its original position, and its tail has been removed from the pelican’s throat. Photograph by Jay L. Ahrend. .

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(Buteogallus Coronatus) in Argentina
SHORT COMMUNICATIONS J. Raptor Res. 54(2):166–171 Ó 2020 The Raptor Research Foundation, Inc. ELECTROCUTION ON POWER LINES IS AN IMPORTANT THREAT FOR THE ENDANGERED CHACO EAGLE (BUTEOGALLUS CORONATUS) IN ARGENTINA 1 JOSE´ H. SARASOLA Centro para el Estudio y Conservacio´n de Aves Rapaces en Argentina (CECARA). Universidad Nacional de La Pampa, Avda Uruguay 151, 6300 Santa Rosa, Argentina and Instituto de las Ciencias Ambientales y de la Tierra de La Pampa (INCITAP-CONICET), Avda Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina MAXIMILIANO A. GALMES Centro para el Estudio y Conservacio´n de Aves Rapaces en Argentina (CECARA), Universidad Nacional de La Pampa, Avda Uruguay 151, 6300 Santa Rosa, Argentina and The Peregrine Fund, Boise, ID 83709 USA BRYAN D. WATTS Center for Conservation Biology, College of William & Mary, Williamsburg, VA 23187 USA and Virginia Commonwealth University, Williamsburg, VA 23284 USA ABSTRACT.—Electrocution is a widespread conservation problem for birds of prey that has received little attention in the Neotropics. Here we present electrocution records involving the endangered Chaco Eagle (Buteogallus coronatus) in central Argentina, and we provide information on the power pole structural characteristics associated with electrocutions. Nine Chaco Eagles were recorded electrocuted during the period 2012–2019 over an area of 9000 km2. Chaco Eagles were found electrocuted in association with five types of power poles, but more than half the electrocutions (55%) were on poles made of steel-reinforced concrete and with jumper wires above the crossarms. With the addition of four previous electrocution reports in this region during the same time period, the annual rate of Chaco Eagle electrocutions was similar to the rate of mortality by other human-related factors such as direct persecution.
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