SHORT-TOED SNAKE EAGLE

Circaetus gallicus
Culebrera europea
English: Short-toed-Eagle.
German: Schlangenadler.
French: Circaète Jean-le-Blanc.
Order: Falconiformes.
Family: Accipitridae.
62-69 cm.
160-175 cm.
The Short-toed-Eagle stands out from other Iberian raptors thanks to its yellow eyes and its scaly, featherless legs in shades of gray/bluish.
Feathers are not a variable to be considered for sexing this species.
It is possible to recognize 4 different ages:

Juvenile specimen: these individuals have new feathers, that is, without molt limits. The wing lacks the subterminal band of gray tones. The secondaries have very poorly marked bands and all the bands of the central rectrices have the same width.

2nd year specimen: they have a completely juvenile plumage in spring before the molt, so it will apparently be quite worn. During the autumn months, these individuals appear with two generations of feathers (juvenile feathers in brown tones and very worn that contrast with the newer ones with darker colors).

3rd year specimen: these specimens can be identified as long as they retain some juvenile flight feathers. In that case, the retained juvenile secondaries are clearer and with poorly marked bands.

Adult specimen: these individuals have several generations of feathers, all of them adult type. The bands of the secondaries are wide and well defined, with the subterminal being the widest. On the other hand, the bands of the central rectrices have a different width, with the last one being the widest. The number of bars of the rectrices can change depending on the individual and the stage it is going through.
Short-toed-Eagle have an incomplete post-nuptial molt that takes place between the months of May and October, since they do not replace all the flight feathers and rectrices in one year. On the other hand, the post-juvenile molt does not start until the spring of the 2nd year, leaving some outer primaries and central secondaries unchanged.
Primaries: 10 per wing.
Secundaries: 14-16 per wing.
Rectrices: 12.
Link: http://blascozumeta.com/

La obtención de este material ha sido posible gracias al permiso necesario de la Junta de Andalucía.

AUTORIZACIÓN DE LA DIRECTORA GENERAL DE MEDIO NATURAL, BIODIVERSIDAD Y ESPACIOS PROTEGIDOS DE LA CONSEJERÍA DE AGRICULTURA, GANADERÍA, PESCA Y DESARROLLO SOSTENIBLE DE LA JUNTA DE ANDALUCÍA, PARA LA CESIÓN DE MUESTRAS BIOLÓGICAS DE ESPECIES DE FAUNA (ARTÍCULO 9 DE LA LEY 8/2003, DE 28 DE OCTUBRE, DE LA FLORA Y LA FAUNA SILVESTRES).

Medidas/Measures

Adult specimen

 

1.- Right primaries. 2.- Primaries. 3.- Details of the outer vane of the outer primaries. 4.- Details of the primaries calamus. 5.- Details of the tip of the inner primaries. 6.- Details of the tip of the outer primaries. 7.- Details of the tip of the outer primaries. 8.- Secondaries (S1-S7). 9.- Secondaries (S8-S14). 10.- Right wing secondaries and tertials. 11.- Details of the secondaries calamus. 12.- Details of the tip of the secondaries. 13.- Details of the outer and inner vanes of the secondaries. 14.- Details of the right wing tertials. 15.- Right wing primaries, secondaries, and tertials. 16.- Right wing primaries, secondaries, and tertials. 17.- Primaries, secondaries, and tertials. Primary coverts and secondary coverts. 18.- Primaries, secondaries, and tertials. Primary coverts and greater coverts + median coverts. 19.- Primaries, secondaries, tertials. Primary coverts and secondary coverts (G, M, and L). Alulas. 20.- Primary coverts. 21.- Greater coverts. 22.- Details of the tertiary coverts. 23.- Details of the secondary coverts (G, M, and L). 24.- Details of the secondary coverts. 25.- Details of the secondary coverts. 26.- Primary coverts. 27.- Greater coverts. 28.- Alulas. 29.- Rectrices. 30.- Rectrices. 31.- Rectrices + uppertail coverts. 32.- Details of the uppertail coverts. 33.- Uppertail coverts. 34.- Details of the rectrices. 35.- Details of the tip of the rectrices. 36.- Details of the rectrices. 37.- Rectrices + undertail coverts. 38.- Details of the undertail coverts. 39.- Undertail coverts. 40.- Assembly of the right scapula. 41.- Feathers of the right scapula. 42.- Infra-coverts primary. 43.- Infra-coverts secondary. 44.- Feathers of the right axilla. 45.- Assembly of the back. 46.- Details of the back. 47.- back feathers. 48.- Assembly of the right flank. 49.- Flank feathers. 50.- Assembly of the abdomen. 51.- Abdominal feathers. 52.- Right tarsal feathers. 53.- Crown feathers. 54.- Chest feathers. 55.- Throat feathers. 56.- Sensory feathers of the beak.

Leave a Comment

Your email address will not be published. Required fields are marked *

Esta web utiliza cookies propias para su correcto funcionamiento. Contiene enlaces a sitios web de terceros con políticas de privacidad ajenas que podrás aceptar o no cuando accedas a ellos. Al hacer clic en el botón Aceptar, acepta el uso de estas tecnologías y el procesamiento de tus datos para estos propósitos. Configurar y más información
Privacidad