141 Red-legged Partridge
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- Roy Morrison
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1 SEXING Male (10-X). RED-LEGGED PARTRIDGE (Alectoris Male with br oad and glossy black ar eas on neck and base of bill; spurs in both legs, rounded and with width at base similar to four scales; width of tarsus at spur level wider than 8,6 mm; wing longer than 158 mm. Female with smaller and duller black ar eas on neck and base of bill; without spurs, with spur in only one leg or in both legs; pointed and with width at base lesser than four scales; width of tarsus at spur level narrower than 8,4 mm; wing shorter than 154 mm. Juveniles can be sexed since 3 months old when spurs start to grown on males. IDENTIFICATION cm. Brown reddish upperparts; grey breast, reddish on belly; black streaked neck; chestnut, black and white streaks on flanks; bill, ocular ring and legs red. Sexing. Patttern of breast: left male; right female. Pattern of head: top adult; bottom juvenile. Sexing. Width of spur: top male; middle and bottom female. SIMILAR SPECIES This species is unmistakable. Page 1
2 AGEING 3 types of age can be recognized: Juvenile with brown upperparts; underparts buff without barred flanks; throat white without black edge; outer primaries with white spots on tips; grey bill; dull reddish legs. 1st year autumn/2nd year spring similar to adults but with two juvenile outer most pr i- maries retained which are pointed and have a white spot on tip. CAUTION: white tip on outer primaries can be very small or be absent due to wear; check differences of colour between retained juvenile primaries, paler and worn, and darker changed ones). Adult without moult limits on the wing, with outermost primaries with rounded tip and without white spot. Ageing. Pattern of the white spot on tips of the outermost primaries: top adult; middle 1st/2nd year; bottom juvenile. MOULT Complete postbreeding moult, usually finished in November. Partial postjuvenile moult including all feathers except the two outermost primaries, which are retained; finished early November. PHENOLOGY Ageing. Pattern of breast: left adult; right juvenile. Ageing. Pattern of flank: top adult; bottom juvenile. I II III IV V VI VII VIII IX X XI XII STATUS IN ARAGON Resident. Widely distributed throughout the Region, absent only from some areas of the Pyrenees. Female (10-X) Page 2
3 Head pattern: top juvenile (05VIII); bottom young (26VII). Juvenile (05-VIII) Young (26-VII) Breast pattern: top left male (10-X); top right female (10-X); left juvenile (05-VIII); bottom young (26VII). Head pattern: top male (10-X); bottom female (10-X) Page 3
4 Redlegged Male. Pattern of leg and spur (09X). Male: flank pattern (10-X) Redlegged Female. Leg pattern: top without spur; bottom with spur (09X). Female: flank pattern (10-X) Juvenile: flank pattern (05VIII) Tail pattern: top left adult (02-I); top right juvenile (05-VIII); left young (26-VII). Young: flank pattern (26-VII) Redlegged Juvenile. Leg pattern (08VIII). Page 4
5 Adult: pattern of the outermost primaries (05-XI). Upperpart pattern: top left male (10-X); top right female (10-X); left juvenile (05-VIII); bottom young (26VII). 1st year: pattern of the outermost primaries with fresh tips (09-X). 1st year: pattern of the outermost primaries with worn tips (05-XI). Juvenile: pattern of the outermost primaries (05-VIII). Page 5
6 Young: pattern of the outermost primaries (26-VII). Young: pattern of wing (26- VII). Adult: pattern of wing (05- XI). 1st year: pattern of wing (09- X). Juvenile: pattern of wing (05- VIII). Page 6
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