Birds diurnal

Cozumel Emerald

Cynanthus forficatus

A shimmering island treasure found only on the shores of Cozumel. This vibrant hummingbird dazzles with its deeply forked tail and iridescent green plumage.

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Quick Identification

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Size

Length: 8-10 cm (3.1-3.9 in); Weight: 2.5-4 g (0.09-0.14 oz)

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Colors

Males are a brilliant iridescent emerald green with a dark blue-black tail; females are green above with pale gray underparts and a white stripe behind the eye.

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Key Features

Deeply forked, long blue-black tail (males)
Bright red bill with a distinct black tip
Shimmering iridescent green throat and breast
Small white spot or streak behind the eye

When You’ll See Them

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Activity pattern diurnal

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Peak hours 7:00 AM - 10:30 AM and 4:00 PM - 6:30 PM

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Season Year-round

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Diet Specializes in floral nectar from native tropical plants; supplements its diet by 'hawking' for small insects and spiders to gain necessary protein.

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Habitat Widespread across Cozumel in tropical scrub, deciduous forest edges, mangroves, and suburban gardens.

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Behavior

The Cozumel Emerald is a high-energy acrobat, spending its day in a blur of rapid wingbeats and territorial displays. As an island endemic, it has adapted to the specific flora of Cozumel, often seen 'trap-lining'—visiting a series of nectar-rich flowers in a repeatable, circular route throughout the day. They are remarkably bold for their size and will aggressively defend a choice patch of flowers from other hummingbirds or even larger bird species.

In residential areas, they have become quite accustomed to human presence. They are frequent visitors to backyard gardens, where they can be observed hovering with precision or performing high-speed aerial maneuvers. Unlike some more reclusive forest birds, the Cozumel Emerald is a social centerpiece of the island's avian life, often perching on low, exposed twigs between feeding bouts to preen and survey their territory.

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Camera Tips

Capturing the Cozumel Emerald requires a strategy focused on speed and lighting. Because these birds move with incredible velocity, set your camera to its fastest shutter speed or use a 'burst' mode to ensure you don't end up with a green blur. If your AI camera has a pre-buffer or 'pro-capture' feature, enable it; this allows the camera to save frames from just before you hit the shutter, which is vital for birds that dart in and out of the frame in milliseconds.

For placement, position your camera approximately 3 to 4 feet away from a red hummingbird feeder or a cluster of tubular flowers like Firebush (Hamelia patens). Aim for a side-profile angle rather than head-on; this is the best way to showcase the male's signature deeply forked tail and the brilliant red of the bill. Mount the camera at eye level—roughly 4 or 5 feet off the ground—to get an intimate, non-distorted view of their feeding behavior.

Lighting is your best friend when dealing with iridescence. To make the emerald feathers 'glow' in your photos, place the camera with the sun at your back, illuminating the bird's front. However, avoid the harsh midday sun which can wash out the colors; the golden hour light of early morning or late afternoon will provide the warmest, most saturated greens and blues. If you are using a trail camera, ensure the PIR sensor is set to its highest sensitivity, as these tiny birds may not always trigger lower-sensitivity sensors.

Finally, consider the background. A cluttered background can confuse both the autofocus and the AI identification. Try to position your camera so there is a bit of distance between the feeder/flower and the foliage behind it. This creates a soft, blurred background (bokeh) that makes the vibrant green of the Cozumel Emerald pop. If you are using sugar water as a lure, ensure it is a clean 4:1 water-to-sugar ratio with no red dye, as the birds are naturally attracted to the feeder's hardware color itself.

Similar Species

Species that look similar or are commonly confused with Cozumel Emerald.

Canivet's Emerald

Found on the mainland; the Cozumel Emerald was formerly considered a subspecies but has a longer tail and is restricted to the island.

Green-breasted Mango

Much larger with a heavier, curved black bill and lacks the deeply forked tail of the Emerald.

Frequently Asked Questions

Cozumel Emeralds are most active during the early morning hours just after sunrise and again in the late afternoon. These are the peak times for nectar production in local flowers.

The best way to attract them is by planting native red or orange tubular flowers like hibiscus or firebush, and hanging a clean hummingbird feeder filled with a simple sugar-water solution.

Their diet consists mainly of nectar for energy and small insects like gnats or spiders for protein and minerals.

Yes, they are very common in suburban gardens and parks throughout Cozumel, as they have adapted well to human-modified landscapes with flowering plants.

The male is easily identified by its deeply forked blue-black tail and bright red bill with a black tip. On Cozumel, its unique tail and bill color are the best field marks.

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