Stripe-throated Hermit

Overview

The stripe-throated hermit (Phaethornis striigularis) is among the smallest of the hermit hummingbirds: 9–10 cm, 2–3 grams, with a short but curved bill scaled to the small tubular flowers it favors. The plumage is dull compared to many hummingbirds — iridescent green above, pale rufous rump, buff underparts — but the head pattern is distinctive: a blackish eye-mask running cheek to cheek, cut by a pale ochre eyebrow and cheek stripe, and faintly streaked buff throat that gives the bird its name.

It was once treated as a subspecies of the little hermit (P. longuemareus) but is now recognized as a separate species. Like all hermits, it trap-lines rather than defends a nectar territory, and males form leks where they sing persistently from fixed low perches to attract females.

Why Tortuguero

The stripe-throated hermit occupies a slightly different niche than its larger congener the long-billed hermit: it forages at lower heights, tolerates more disturbed habitats, and is found at forest edges, secondary growth, and even weedy thickets along canal edges within the park. Where the long-billed hermit is tied to intact understory, this species turns up wherever there is flowering vegetation and overhead shade — which in Tortuguero is nearly everywhere along the waterways.

It pollinates a range of small-flowered herbs and shrubs that the larger hermits’ bills don’t fit, filling a functional role in the plant community that the big hermit cannot substitute for.

How to see them (honestly)

• This is an easy bird by hermit standards. Any shaded edge with flowering vegetation along the park’s canal system is a candidate location.
• Forage height is low — often below a metre in dense herb-layer. Watch flowering clumps of low shrubbery more than the tree understory.
• The flight is fast and darting; the hovering pause at flowers is brief. The pale face-stripe is the easiest field mark in motion.
• Males sing from fixed perches within thickets; the call is high-pitched and repetitive, similar to the long-billed hermit’s lek song but thinner.
• Distinguishing from the long-billed hermit at a distance: smaller size, shorter bill, and preference for lower, more open vegetation are the key cues.

Status note

Least Concern globally, with a broad range and tolerance of secondary habitat that buffers it against the forest loss hitting other understory specialists. It is included in CITES Appendix II as a matter of general hummingbird-family protection, not because of documented population pressure. The species’ adaptability to disturbed edges is a slight advantage in a region where forest-edge habitat is common — but intact forest still supports the highest densities.