Birds diurnal

Garden Emerald

Chlorostilbon assimilis

A shimmering jewel of the Central American landscape, the Garden Emerald is a tiny powerhouse of iridescence. Watch these feisty hummingbirds zip through your garden with unmatched speed and bold personality.

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0 Habitats

Quick Identification

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Size

8–9 cm (3.1–3.5 in) in length; weighs approximately 3.2–4.1 g (0.11–0.14 oz)

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Colors

Males are a shimmering metallic emerald green with a dark blue-black tail; females have green upperparts and pale grayish-white underparts with a white stripe behind the eye.

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Key Features

Brilliant iridescent green body in males
Deeply forked, blue-black tail
Short, straight black bill
Females feature a distinct white 'ear' streak behind the eye

When You’ll See Them

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Activity pattern diurnal

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Peak hours 6:30 AM - 9:00 AM and 3:30 PM - 5:30 PM

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Season Year-round; sightings often peak during the dry season (December to April) when many tropical plants are in full bloom.

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Diet Primarily floral nectar from tubular flowers (like Porterweed and Heliconia) and sugar-water from feeders; also 'hawks' for small insects and spiders mid-air for protein.

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Habitat Open areas including suburban gardens, coffee plantations, forest edges, and scrubby clearings.

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Behavior

The Garden Emerald is a charismatic and highly active hummingbird that treats any flower-filled backyard as its personal kingdom. Known for its 'trap-lining' behavior, it follows a regular route between nectar sources throughout the day, though it can become quite territorial over a high-quality food source like a well-maintained feeder. You'll often hear them before you see them, as they emit a series of dry, scratchy 'tsip' notes while foraging or chasing off intruders.

These birds are remarkably bold around humans, often hovering just a few feet away to inspect a gardener or a new camera setup. Despite their tiny size, they are fearless, frequently engaging in mid-air dogfights with larger hummingbird species to defend their favorite perches. When they aren't feeding, they like to rest on high, thin twigs that offer a wide view of their surroundings, preening their iridescent feathers to keep them in peak flight condition.

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Camera Tips

To capture the stunning iridescence of a Garden Emerald, lighting is your most important variable. These birds' feathers are structural, meaning they only appear brilliant green when light hits them at a specific angle. Position your AI camera so the morning sun is behind the lens, illuminating the bird's chest as it approaches a feeder. Avoid heavy shade, as the bird will appear as a dark, flat silhouette rather than a shimmering emerald.

Placement should be very precise: mount your camera 12 to 15 inches away from a nectar feeder or a flowering plant like Stachytarpheta (Porterweed). Because these hummingbirds are small, a wide-angle lens might make them look like tiny dots; if your camera allows, use a macro or narrow-field setting to fill the frame. Aim for a mounting height of 4 to 5 feet, which is their typical 'cruising altitude' in a garden setting. Use a sturdy tripod or a flexible clamp mount to ensure the camera doesn't wobble, as the wind from their wings can sometimes trigger motion sensors.

Since Garden Emeralds move with incredible speed, your camera's shutter speed or 'motion sensitivity' should be set to its highest level. If your device supports it, use 'burst mode' to capture a series of shots, increasing the odds of getting that perfect frame where the wings are fully extended. For lure suggestions, nothing beats a cluster of red or purple tubular flowers. If using a feeder, ensure the nectar is fresh (4 parts water to 1 part white sugar) and the feeder has a perch; while they can hover, they will often sit still for a few seconds if a perch is available, giving your AI camera more time to focus and identify the species.

Similar Species

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

Blue-tailed Emerald

Very similar but found mostly in South America; the Garden Emerald was previously considered the same species but is now split based on geography.

Canivet's Emerald

Found from Mexico to Belize; the male Canivet's has a much more deeply forked tail with white tips on the outer feathers.

Scaly-breasted Hummingbird

Larger than the Garden Emerald with a mottled, 'scaly' appearance on the underparts rather than solid emerald green.

Frequently Asked Questions

Garden Emeralds are most active during the early morning hours shortly after sunrise and again in the late afternoon. This is when they 'refuel' their high metabolism after the night and prepare for the evening.

The best way to attract them is by planting native tubular flowers like Porterweed, Firebush, or Shrimp Plants. They are also frequent visitors to hummingbird feeders filled with a clear 4:1 water-to-sugar solution.

They primarily eat nectar for energy but also rely on small insects and spiders for essential protein. You may see them 'gleaning' insects off leaves or catching them in mid-air.

Yes, they are one of the most common hummingbirds in human-settled areas of Panama and Costa Rica. They adapt very well to gardens, parks, and even urban balconies with flowering plants.

In its range, look for the male's completely green underparts and deeply forked blue-black tail. The female's grayish belly and the distinct white stripe behind the eye are her best field marks.

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