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Tree swallows, violet-green swallows and Northern rough-winged swallows are all found along the river as it passes Elijah Bristow park.
We assessed cell-mediated immune response from 1997 to 2002 using a phytohaemagglutinin (PHA) injection in nestlings of three species of cavity-nesting birds: Ash-throated Flycatcher (Myiarchus cinerascens), Western Bluebird (Sialia mexicana), and Violet-green Swallow (Tachycineta thalassina).
Violet-green swallows zip overhead like tiny cruise missiles, their mouths open in hopes of catching a meal.