Fur, Feather, Fin - Glaucous Macaw
- Location
- 47° 09′ S, 126° 43′ O
Glaucous macaw
Description:The glaucous macaw is (with a few exceptions due to diseases or genetic and statistical anomalies) between 66 and 72 cm long with an average of 70 cm for a weight of around 800 grams on average. To the human eye male and female look similar with mostly pale turquoise-blue with a large, greyish head but for them and any other species capable of seeing ultraviolet they have sexually dimorphic plumage in the UV spectrum with broad stripes on the wings and chest of males and long but thin stripes on the tail and back of females. The term glaucous describes its colouration. It has a long tail and a large bill. It has a yellow, bare eye ring and half moon-shaped lappets bordering the mandible.
The skin of a glaucous macaw is seemingly translucent and thin, it is covered by their feathers. Their skin cells help make up the beak,cere,scales of the legs and feet and claws.
They have between 2400 to 2500 feathers wich assist them in flight, keep them warm, attract potential mates and scare away predators. Small, subtle contour feathers cover the body. These help to insulatethe macaw.They will fluff up their body feathers to intensify insulation and smooth them down to cool off. They will also lift and lower patches of their feathers to show off.
The glaucous macaws has a body consisting of:
Two Zygodactyly (two toes facing forward and two back) clawed legs wich are sufficiently dexterous to be able to use their feet to manipulate food and other objects with a high degree of dexterity,they exhibit "handedness", a distinct preference with regards to the foot used to pick up food, with adult parrots being almost exclusively "left-footed" or "right-footed",the preference between left and right differs from one species to another, in the case of the glaucous macaw it's left which predominates.
A long, pointed feather tail.
A pair of elliptical wings which, thanks to their rounded and shortness, allow for tight maneuvering in confined spaces such as dense vegetation,The wings are also extensions that assist with flight. The wings are compounded for strength. They act as the arm and hand bones of a human, if you will.
And one head comprising:
A curved, broad bill. The upper mandible is prominent, curves downward, and comes to a point. It is not fused to the skull, which allows it to move independently, and contributes to the high biting pressure they are able to exert. A healty glaucous macaw, has an average bite force of 28 kg/cm2 which is needed for breaking into hard seeds and nuts and for excavating their nesting holes in trees and soft rocks. Though rarely used in serious fighting, the beak can be a formidable weapon if a bird feels threatened, and they are capable of killing other birds.The lower mandible is shorter, with a sharp, upward-facing cutting edge, which moves against the flat part of the upper mandible in an anvil-like fashion. Touch receptors occur along the inner edges of the keratinised bill, which are collectively known as the "bill tip organ", allowing for highly dexterous manipulations. They have a strong tongue (containing similar touch receptors to those in the bill tip organ), which helps to manipulate seeds or position nuts in the bill so that the mandibles can apply an appropriate cracking force.
Of two ears holes located below and behind each eye under feathers
And of two eyes positioned high and laterally in the skull, allowing a visual field unique to them and other parrots among the birds. Without turning its head, a glaucous macaw can see from just below its bill tip, all above its head, and quite far behind its head. They also have quite a wide frontal binocular field for a bird, although this is nowhere near as large as primate binocular visual fields. Unlike humans, they are also sensitive to ultraviolet light,the eye is one of their largest organs in size.To aid their survival, bird eyelids were designed so that their vision is not impaired even when they blink!! They have 3 eyelids with the upper and lower eyelids lined with small bristle feathers. The 3rd eyelid, called the nictitating membrane, is used for blinking keeping the eyeball moist and clean. Lying beneath the eyelids on the nostril side, it is transparent and allows them to see when blinking. It has been noted that some birds use this eyelid as safety glasses while flying. They can close this 3rd eyelid while flying!
Life cycle:
The mating season starts at the beginning of the summer rains,at the start of the year with nests constructed in tree cavities or cliff faces depending on the habitat,hollows of sufficient size are only found in trees around 60 years of age or older, and competition is fierce. Existing holes are enlarged and then partially filled with wood chips,then mating season extends up to May, when the young begin to fledge and leave the nest. A pair of glaucous macaw lay two to four eggs per year.The eggs are incubated for approximately 27 days,the male tends to his mate whilst she incubates. Althougt some pairs produce four chicks, the average survival rate is three per pair. However,even if most do ther is pairs of birds in the wild population who don't mate often or at all. The young remain with their parents for up to a year. Juveniles reach sexual maturity around 3–4 years of age.The average lifespan is 46 to 49 years.
A female bones become denser during breeding time. This is to enable her to store the calcium needed to create eggshells. A female's skeleton can weigh up to 20 percent more during breeding season due to calcium storage, then the rest of the time.
Senses:
They have a keen sense of sight,with eyes having all of the cones that allow them to see the colors of the spectrum. In addition, they have a fourth cone making them able to see in the UV range, they can recognize details and to tell the difference in colors.
They also have an acute sense of touch. Parrots will use their feet and their mouths to touch their surroundings, to play, and to determine what is safe to perch on or chew on or eat. You will notice this behavior quite frequently if you watch them. They are discovering and examining objects just as a human would use their hands.
The glaucous ears are located below and behind each eye.Their ears appear as holes. Parrots in general are known to have the capability to recognize sound waves and determine where the sound is coming from. However, birds seem to be less receptive to higher and lower pitch.
The heare holes of the macaw are protected under special fine feathers wich cut down on wind noise These feathers deaden the howl of the wind as it rushes past their ears and allows them to hear other sounds that might be more important. These special feathers work just like the black foam you see covering a microphone. The end result is that Parrots and most other birds can hear just about as well (or even better) than we can.
A parrot's hearing is not so much more sensitive than ours as it is more detailed. They hear things differently than we do. For instance, where we might only perceive a single tone of sound, they will hear several.
The glaucous macaw sense of smell is theorized to be limited since they don't have a lot of receptors for scent. but their taste buds are also limited compared to ours. However we certainly see Parrots respond eagerly to foods they appear to like, so it is possible that the few ones they have are very effective or that we have not yet found all of them, this is something that is still being studied by the zoologists.
Habitats/routine:
It prefers semi-open, somewhat wooded habitats. It usually avoids dense, humid forest, and in regions dominated by such habitats, it is generally restricted to the edge or relatively open sections (e.g. along major rivers). In different areas of their range, these parrots are found in savannah grasslands, in dry thorn forests known as caatinga, and in palm stands or swamps,areas including seasonally inundated savannas, wetlands and anthropogenic areas habitats interspersed with a mosaic of savannas, are good indicators for the presence of the macaws.
Predators:
Beyond the poachers, the predators of the glaucous macaw are numerous, the false vampire bats, certain felines and raptors are the most common with more rarely monkeys and snakes.
Food:
The primary diet of Glaucous macaw are the nuts but seeds are also eaten, as well as flowers and fruits.
The macaw usually forages in groups. They preferentially feed on the palms and trees who grow in groves, mixed together with taller trees. A tall tree is selected by the flock as base to carefully inspect the feeding area. First a pair descends to the level of the palms to assess the suitability, the pair then returns to base, and then the entire flock descends to decide if it is worth staying around. If it is, then the macaws generally feed directly at the site, tearing the fibrous pulp off the fruit to obtain the extremely hard and thick-shelled nut. The pulp is often discarded while trying to get the cores as fast as possible. The heavy bills appear to have evolved specifically to crack open the palm nuts with a chisel-shaped edge, being precisely of the correct size and shape. Upon occasion the birds maw fly off to a better perch to consume the nut, sometimes even carrying a branchlet with a few fruit. Such perches are generally a branch of a tall tree or a cliff face, and the ground below such a perch will become littered with piles of cracked palm nut shells, and are thus easily spotted.
The glauous macaw serve as pollinators for several species of large-fruited trees.Indeed macaws are very messy eaters,and this species is no different. A study found a significant number of undamaged palm nuts on the ground below the branches or rocks where the birds occasionally carry their harvest.
A method by which the birds may secondarily disperse the nuts is by their habit of coming down to the ground to search out the nuts regurgitated by cattle, which eat the fruit, but usually cough up the large seeds, cleaned of pulp, which often aggregate in areas where the ruminants rest, and some also appear to be viable after this ordeal. Flocks of Lear's macaws will congregate at cattle corrals and walk around on the bare ground of rumination sites. After finding one, the regurgitated nut is often eaten on a high perch elsewhere.
Interesting anecdotes:
Their latin name is "Anodorhynchus glaucus"
They cannot sweat because they do not have sweat glands. For this reason they must find a way to keep themselves cool. If you notice them holding their wings away from their body with mouth open, curling their tongue, this is a normal behavior to help keep cool.
They are greatly appreciated by the inhabitants of Guangchou for their endearing habit of reproducing sounds,their love of cuddling and their beauty,poacher learned that the hard way.
They have pneumatic bones. These particular bones contain air sacs and in certain cavities of the body. Pneumatic bones help lighten the body and cool them more proficiently. You must always handle a bird carefully because some bones in the bird are hollow. These hollow bones are much lighter making it easier for flight but because they are hollow it makes them more vulnerable to break.
These birds are said to have inspired the japanese poet Kobayashi Issa to write a haiku about them:
"Calm break of the day
before blue glaucous macaw
betrayed by the tea"
the haiku is said to have been inspired by a visit he made to guagchou in his youth when he worked for a shipping company in tokyo, while he was having morning tea he was surprised to find in his cup a leftover droppings by one of the glaucous macaws who were sitting above the terrace.
They have ten neck vertebrae,this makes a parrot's neck more mobile. A parrot can turn its head almost 180 degrees, looking over its shoulder. In the wild this gives the bird an advantage in spotting food and/or predators and to scare peoples who are not used to it.
Glaucous macaws were introduced into Guangzhou in 1832 from northern Argentina by a South American trader, the second daughter of the British diplomat of the time Ada Aworth had fallen in love with them, finding them magnificent and amusing, the trader smelled a good potential deal and successfully negotiated with the father after that during the following trips he brought several cages, enough for a viable breeding population, over time enough escaped to create a thriving breeding population in the Guang Islands to the point that it was decided that there was no real reason to keep them in an aviary when the trees in the garden (which produced nuts that birds are very fond of) had a handful each on their branches.
They were released in an event now remembered as "the great blue wind" which was immortalized in painting by the artist Haru Dae
The respiratory system is extremely efficient and sensitive. Although it is capable at exchanging gases in the system, two complete breaths are required to do the same work that a single breath does in people; because of this you may observe your parrot breathing quickly, this is normal behavior.
Currently considered extinct or almost extinct in their native South America, the Guangchou population is the last known with certainty in the world. Repopulation projects in South America with breeding pairs of Guangchou are being studied at the diplomatic level.
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