
Barn Swallow
Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Passeriformes; Family: Hirundinidae; Genus: Hirundo; Species: Hirundo rustica
Family: Hirundinidae (Swallows and Martins)
- Shape
- Highly asymmetrical and elongated (attenuated) with a distinctively pointed tip and a narrowed trailing vane, characteristic of the 'swallow-tail' fork
- Size
- Estimated 7-10 cm in length. The extreme elongation suggests an adult male, as tail streamers in Barn Swallows vary by sex and age
- Rarity
- Very Common; one of the most widespread and familiar birds in the world
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Description
This feather comes from one of the most agile aerial insectivores. The Barn Swallow is a small bird with a deeply forked tail, rufous throat, and blue-black upperparts. This specific feather contributes to the signature 'streamer' look
Colour & Pattern
Dorsal surface is a deep iridescent steel-blue to blackish-brown. Distally, the inner vane features a prominent, oval-shaped white spot (subterminal window). The ventral side is duller gray-black
Barb Structure
Tightly interlocked pennaceous barbs for aerodynamic integrity during high-speed flight; plumulaceous (downy) barbs present only at the very base near the calamus
Texture & Surface
Smooth, stiff, and slightly glossy on the upper surface due to structural coloration; the vane feels firm and crisp to the touch to withstand flight pressure
Key Features
Extreme elongation, stark contrast between the blackish-blue vane and a crisp white subterminal spot, and significant asymmetry
Habitat
Open country, farmlands, meadows, and near water bodies. Often found nesting on man-made structures like barns, bridges, and eaves
Geographic Range
Globally distributed; breeds across North America, Europe, and Asia. Most populations are long-distance migrants, wintering in South America, Africa, and Australia
Ecological Role
Vital insect predator, consuming thousands of flies, beetles, and wasps daily. They serve as excellent indicators of local insect abundance and habitat health
Similar Species
Tree Swallow (lacks white tail spots), Cliff Swallow (shorter, squared tail), and Purple Martin (larger, no white tail windows)
Interesting Facts
The length of these tail feathers is a signal of fitness; females typically prefer males with longer, more symmetrical tail streamers as they indicate better health and parasite resistance
Condition Notes
Fair to Good. The feather shows some mechanical wear and separation of the barbs ('zipped' parts are coming undone), likely a post-breeding season molt specimen