Glaucous Macaw
Birds diurnal

Glaucous Macaw

Anodorhynchus glaucus

The Glaucous Macaw is the ultimate 'holy grail' for birdwatchers—a stunning turquoise-blue parrot that has eluded the world for decades. Once a master of the South American river cliffs, this elusive species remains a symbol of the mystery and fragility of our planet's biodiversity.

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Quick Identification

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Size

Length of approximately 70 cm (27.5 in); weight estimated between 800-1000g (1.7-2.2 lbs)

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Colors

Pale turquoise-blue body with a distinct greyish-blue tint on the head and neck; bright yellow crescent-shaped skin patches at the base of the bill and around the eyes

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Key Features

  • Pale turquoise-blue plumage
  • Large greyish-blue head and throat
  • Bright yellow crescent skin patch at bill base
  • Massive, powerful black hooked bill

When You’ll See Them

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Activity pattern diurnal
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Peak hours 6-9 AM, 4-7 PM
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Season September-February
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Diet A dietary specialist primarily consuming the hard nuts of the Yatay palm (Butia yatay). They use their incredibly strong bills to crack the shells and extract the oily kernels.
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Habitat Subtropical gallery forests and savannahs, specifically near large rivers with sandstone cliffs and Yatay palm groves.

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Behavior

The Glaucous Macaw was historically a highly social and vocal bird, often seen in pairs or small family groups. Its name in Guarani, 'gua'a hovy,' is an onomatopoeic reference to its loud, raucous squawks that once echoed across South American riverbanks. These birds were known to be intelligent and cautious, spending a significant portion of their day foraging in palm groves or social grooming within their flocks.

As a cliff-nesting species, they showed a strong preference for sandstone precipices where they could find safety from terrestrial predators. Their interaction with humans has been tragically minimal in recent decades; they were heavily impacted by the pet trade and the widespread clearing of the specific palm groves they relied on for survival. Today, they are considered the 'Ghost of the River,' as no confirmed sightings have occurred in the wild for many years.

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Camera Tips

Capturing a Glaucous Macaw on a trail camera would be one of the most significant wildlife discoveries of the century. To have a chance, equipment must be deployed in the lower Paraguay and Uruguay River basins, focusing specifically on remaining stands of Yatay palms (Butia yatay). These trees are the species' primary food source, making them the most likely location for a 'trap.' Mount your cameras at the canopy level, approximately 15-20 feet high, angled toward the fruit clusters of the palms. Use a heavy-duty strap or a screw-in tree mount to ensure stability against wind and movement.

Because these birds are intelligent and potentially wary of new objects, camouflage is essential. Use a camera with a non-reflective 'camo' housing and consider adding local moss or lichen to the exterior of the security box. Settings should be tuned for high-speed action: a trigger speed of 0.2 seconds or faster is vital to capture a bird in flight. Set your camera to 'Hybrid Mode' (photo followed by video) to get both high-resolution stills for identification and video footage to capture vocalizations and movement patterns which are key for scientific confirmation.

Lighting is a major challenge in dense riverine forests. Use 'No-Glow' or 'Black LED' infrared flashes to avoid startling the birds during the dawn and dusk hours when they are most active. Standard white flashes or red-glow LEDs may cause a bird to abandon a roosting site. Additionally, since these areas are often humid, use dessicant packets inside the camera housing to prevent lens fogging, and opt for high-capacity, cold-weather lithium batteries to ensure the camera stays operational for months at a time without human interference.

Finally, consider the 'Time-Lapse' function. If you are monitoring a wide cliff face where nesting might occur, a photo every 5 or 10 minutes during the morning hours can help spot birds that are too far away to trigger the PIR sensor. Always use a high-speed SD card (Class 10 or U3) to ensure the camera can write the large files quickly enough to be ready for a second trigger event if a flock is passing through.

Frequently Asked Questions

Glaucous Macaws are diurnal birds. Historically, their peak activity occurred in the early morning just after sunrise as they left their roosts to forage, and again in the late afternoon before returning to their nesting cliffs.
Due to their status as critically endangered or possibly extinct, attracting them is not currently possible. However, preserving and planting Yatay palms in their native South American range is the best way to support the habitat they require.
The Glaucous Macaw is a specialist feeder, living almost exclusively on the nuts of the Yatay palm. They use their massive, specialized bills to crack the hard outer shells of these nuts.
No, they were never common in suburban areas. They required very specific wild habitats consisting of riverine forests, sandstone cliffs for nesting, and large groves of native palm trees.
The Glaucous Macaw has a much paler, turquoise-blue plumage and a more noticeably greyish head and neck. Lear's Macaw is a deeper cobalt blue and has a differently shaped yellow patch of skin at the base of the bill.

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