NDLI: Biologie de la reproduction et distribution du Grand Corbeau Corvus corax en Corse

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Biologie de la reproduction et distribution du Grand Corbeau Corvus corax en Corse

Content Provider	Semantic Scholar
Author	Delestrade, Anne
Copyright Year	2002
Abstract	The breeding biology and range of Northern Raven were studied in Corsica during the breeding seasons 1999 and 2000. Breeding density, phenology and success were studied in different habitats: the west coast, a pastoral zone in the lowlands, a pastoral zone in altitude and the montane habitat. During 1999 and 2000, 32 and 39 nests were monitored respectively. Nest sites were found from 20 m to 1500 m altitude in all open habitats. Density of breeding pairs was very high in grazed habitats (17-20 pairs / 100 km 2 ), and low in montane zone (4-8 pairs / 100 km 2 ) and on the coast (11-14 pairs / 100 km of coast). Therefore, inter-nest distances varied between zones and were comprised between 1.6 km in pastoral zones and 6 km on the coast. Fledging period was spread over one month with a mean date of 7 June in 1999 and 15 June in 2000. Number of fledglings varied from 1 to 5 per pair, and in average 2.4 juveniles Hedged per successful nest in 1999 against 2.2 in 2000, with a smaller success in the coastal zone. The proportion of successful pairs in grazing zone varied from 95 % (n=19) to 63 % (n=16). The high density of Ravens in Corsica is discussed in relation to local farming practices.
Starting Page	293
Ending Page	300
Page Count	8
File Format	PDF HTM / HTML
Volume Number	70
Alternate Webpage(s)	https://www.creamontblanc.org/sites/default/files/atoms/files/delestrade2002_alauda70_0.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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