Northern Raven
(Corvus corax)
 Cuervo grande  Corb  Erroia  Corvo Grande  Northern Raven
Observations Description Bird voice



Order Passeriformes
Family Corvidae
EURING Code 15720
6D code CORCOR
Category A
Rarity PBN , C


DATA COLLECTED
Observations 877
Nº de individuos 4613
Autonomus regions 17
Provinces 47
10x10 squares 374
Observers 52



PHENOLOGY


DATA BY...


Mes Species Observations Individuals UTMs 10x10 Observers
January 1 77 694 55 21
February 1 41 218 31 14
March 1 102 376 68 20
April 1 146 493 86 21
May 1 104 318 76 25
June 1 42 101 34 13
July 1 50 248 35 12
August 1 101 361 53 19
September 1 53 261 38 18
October 1 49 120 40 18
November 1 46 111 37 17
December 1 66 1312 41 18














REPRODUCTION




Reproducción Species Observations Individuals UTMs 10x10 Observers
desconocido 1 604 3712 286 46
invernada 1 2 7 2 2
reproducción posible 1 23 69 21 7
reproducción probable 1 15 44 13 7
reproducción segura 1 18 109 13 7




Sexo Species Observations Individuals UTMs 10x10 Observers
desconocido 1 768 4339 324 47
machos y hembras 1 3 17 3 3
pareja 1 4 8 4 4




Edad Species Observations Individuals UTMs 10x10 Observers
desconocido 1 732 4234 306 44
adulto 1 56 153 42 15






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