| |
A. aestiva aestiva (nominate) |
A.aestiva xanthopteryx Yellow-Wing |
A. aestiva xanthopteryx type 2 (aka
'Bolivian') |
| COLOUR |
Basic grass green, tending towards olive |
Deeper grass green, with darker scalloping |
Similar dark grass green, with more extensive
dark scalloping |
| BREAST |
Bright green, yellower than grass, no scalloping.
Red/pink hearts to feathers mainly males. In some birds breast lightly
washed with blue |
Similar yellow-green with very slight scalloping.
Can have blue tinge extending onto abdomen in varying degrees |
Yellow-green with darker scalloping. Often
extensive blue wash to throat which can extend to breast & abdomen. |
| FOREHEAD |
Deep turquoise or royal blue |
Varying amounts & shades of turquoise |
Varying amounts & shades of turquoise,
usually deeper |
| HEAD FEATHERS |
Behind blue forehead a band of off-white feathers
merging into deep yellow which extends onto cheeks, around eyes and in
'classic' extends down forming a 'bib' on upper chest.
'Blue-faced' type more common than classic, sometimes with little
or no yellow. Green feathers of head & into centre back slightly scalloped
with grey |
Behind blue frontal feathers a band of creamy-white
edging merges into primrose yellow which can extend over head, neck &
chest (as nominate), but usually restricted to head. Green head feathers
scalloped dark grey to black carrying down sides of neck. |
Most birds have much bright turquoise blue
on and around head, interspersed with shades of yellow in varying amounts.
Green head feathers heavily scalloped black carrying down sides of neck |
| CERE, NOSTRILS & BEAK |
Dark grey to black |
Grey to black |
Grey to black |
| MOUTH & TONGUE |
Black |
Black |
Black |
| BEND OF WING |
Solid bright deep blood red up to and over
bend of wing, odd feather may show fleck of orange yellow (especially
juveniles) |
Red edge up to bend of wing, buttercup yellow
on bend extending onto wing; sometimes covering up to one third of wing |
Red edge up to bend of wing, then red &
yellow interspersed on the bend & extending onto wing in varying amounts |
| CARPAL EDGE |
Pale lime green often with flecks of red |
Yellow green |
Yellow green |
| LEGS & FEET |
Short legs, dark grey with black toenails |
Long legs, dark grey with black toenails |
Long legs, dark grey with black toenails |
| GENERAL SHAPE |
Stockily-built bird, appears 'broad-shouldered' |
Longer slimmer bird, usually larger. Greater
wingspan, long tail |
Stream-lined long slim bird with long wings
& tail |
| CHARACTER & EXPRESSION |
Very strong-willed birds, tend to be very aggressive
in breeding condition/situation. Very confident expression/ demeanour. |
Not so strong-willed, sometimes a little flighty,
often with an aloof/ surprised expression |
Usually playful, boisterous, inquisitive with
a mischievous expression |
| VOCALISATION |
Very different from others |
|
Very vocal birds |
| DISTRIBUTION |
Wide range through north east & eastern
Brazil to south east Matto Grosso |
Chaco |
North & eastern Bolivia, Paraguay &
north Argentina, vast range. |
Forum