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Bedbug , bed·bug / ˈbedˌbəg/ • n. a bloodsucking insect (family Cimicidae, Cimex and other genera) that is a parasite of birds and mammals, some species of wh… gnatcatchers , Polioptilidae (gnatcatchers, gnatwrens; class Aves, order Passeriformes) A family of small, active birds; gnatcatchers are mainly grey and white, gna… Barn owls , Tytonidae (barn owls, bay owls; class Aves, order Strigiformes) A family of owls that have heart-shaped facial discs which meet above the bill in Tyt… Water Beetle , water beetle Aquatic beetle. Whirligig beetles (family Gyrinidae) skim around the surface of water, feeding on small insects. Water scavenger beetles… Caddis Flies , North America’s streams, rivers, and lakes are home to more than 1,200 different species of caddisflies, which are aquatic insects in the order Trich… Chezys Formula , Chezy's formula An empirical formula that relates river discharge (Q) to channel dimensions and water surface slope. Q = AC√(rS), where A is the cros…
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