Identification, moult and ageing                                          

	Visual differentiation between Certhia familiaris and C. brachydactyla
	Moult and ageing of Luscinia svecica and Cercotrichas galactotes
	Identification, moult and ageing of Iberian Finches
	Visual differentiation between Lanius senator and L. collurio
	Sexing young Montagu's Harriers Circus pygargus

 

 

External resources

 

Birds.se
Atlas de aves de Aragón
Asociación Pasos Largos
Ageing and sexing quiz
The bird in the hand
Duck identification (USA)
Wing image collection (USA)
Phalacrocorax carbo subspecies
Sterna albifrons
Sexing & ageing package (pago)