14 
Pererva, V.I. 1981. Unusual case of individual selection of 
prey by the red-footed falcon (Falco vespertinus). 
Ornitologiya 16:180. 
Ponting; EsD. 1967. -Cormorant Gating frog. ,British Birds 
60:482. 
Pope, P.H. 1928. The life history of Triturus viridescens. 
Copeia 168:61-73. 
Rabgl, J. 1978. Goldcrests Regulus regulus killed by edible 
frogs Rana esculenta. Brittish Birds 71:85. 
Rebecca, G.W. 1982. Merlin apparently preying on common 
EGOG. SCOEELSH Birds, 12(3) 289. 
Rékasi, J. 1980. Uber die Nahrung des Weissstorchs 
(Ciconia ciconia) in der Batschka (Sud-Ungarn). 
Ornithologische Mitt., Gottingen 32(6):154-155. 
Rising, J.D., and F.W. Schueler. 1980. Screech owl eats 
fish and salamander in winter. Wilson Bull. 92(2): 
250—251) 5 
Ritchie, J. 1926. A curious food supply of the common gull. 
common gull feeding upon frogs. Scotland Natur. 
191263 22-23), 
Roca, R.L. 1982. Estrategias reproductivas y sucesion 
temporal de una comunidad de anuros (Amphibia: 
Salientia) en los llanos Venezolanos (estado apure). 
Thesis Universidad Simon Bolivar:149. 
Rosenfield, R.N., and M.W. Gratson. 1984. Food brought by 
broad-winged hawks Buteo platypterus to a Wisconsin USA 
nest. J.Field Ornithology 55(2):246-247. 
Ross, A. 1969. Ecological aspects of the food habits of 
insectivorous screecn-owls. Proc. West. Fdn. Vert. 
ZOOL. VsSO0l—344. 
Ruprecht, A.L. 1979. Food of the barn owl Tyto alba guttata 
from Kujawy Poland. Acta. Ornithol. 16(19):493-5I1. 
Rusch, D.H., and P. Doerr. 1972. Broad-winged hawk nesting 
and, £ood habits..~, Auk+7893139—145.. 
Sarker, S.U. 1983. Food and feeding habits of some birds of 
Pabna Bangladesh. J. Asiatic Soc. Bangladesh 9(1):25-38. 
Sazima, I. 1978. Convergent defense behavior of two 
leaf-litter frogs in southeastern Brasil. Biotropica 
HOC U53'. 
Schaeffer, H. 1970. Womit Ernahrt der Uhu (Bubo bubo) in 
Lapplan seine Jungen? Bonn. Zool. Beitr. 21:52-62. 
Schardien, B.J., and J.A. Jackson. 1982. Killdeers feeding 
on frogs. Wilson, Bull. 94(1)285=s75 
Schiebe, A. 1975. Grasfrosch (Rana temporaria) frisst 
Jungvogel. Gefiederte Welt 96(12):242-243. 
Schwalm, P.A., P.H. Starrett, and R.W. McDiarmid. 1977. 
Infrared reflectance in leaf-sitting neotropical frogs. 
Science 19621225=-1227. 
Seale, Dianne B. 1982. Physical factors influencing 
Oviposition by the wood fro Rana lyatica in 
Pennsylvania. Copeia 1982( 45 :6272635~ 
