Insects and spiders close up
Spiracle (lower center; opening that lets oxygen into the tracheal system) and haltere (upper right; orange knob-shaped organ that helps balance the insect in flight) on the thorax of Tabanus nigrovittatus (Diptera: Tabanidae). Dark brown horizontal structures at top are the wings.
Spiracle (lower center; opening that lets oxygen into the tracheal system) and haltere (upper right; orange knob-shaped organ that helps balance the insect in flight) on the thorax of Tabanus nigrovittatus (Diptera: Tabanidae). Dark brown horizontal structures at top are the wings.
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