| Yellow occurs in the irises of some potoos, and yellow, orange, and ruby occur in frogmouths. |
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| Other reports indicate the nestling period of potoos to be of 40 45 days, that of frogmouths about 30 days. |
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| The nestlings of frogmouths, potoos, and owlet-frogmouths are semi-dependent, are covered with whitish down, are fed by both parents, and remain in the nest until fledged. |
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| Fossils of owlet-frogmouths, frogmouths, and potoos from Europe suggest much wider global distributions than their present limited distributions in Australasia and South America. |
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| Nightjars, potoos, frogmouths, Oilbird, and owlet-nightjars of the world. |
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| Potoos and frogmouths frequently sit crosswise and upright when actively foraging and also appear very owl-like, although at rest they may perch quite differently. |
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