flicker

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Related to Northern Flicker: pileated woodpecker, mourning dove, downy woodpecker

flick·er

(flik'ĕr),
The visual sensation caused by stimulation of the retina by a series of intermittent light flashes occurring at a certain rate.
See also: flicker fusion, critical flicker fusion frequency.

flicker

A rapid, transient and intermittent photic discharge sensed in a visual field.

flicker

The visual sensation of alternating intervals of brightness caused by rhythmic interruption of light stimuli.

flicker

Perception produced when the retina is stimulated by an intermittent light stimulus which fluctuates between a frequency of a few hertz and the critical fusion frequency.
References in periodicals archive ?
The original excavator of most Northern Flicker cavities was unclear, but Northern Flickers enlarged two of the six Hairy Woodpecker cavities we monitored tot more than 1 y.
Specifically, we examined the variables influencing breeding season occupancy of cavities previously used by Lewis's and Red-headed Woodpeckers and Northern Flickers, and we examined the relative importance of their cavities and the breeding cavities used by other primary and secondary cavity users during the non-breeding season.
erythrocephalus), Northern Flickers (NOFL; Colaptes auratus), Red-breasted Nuthatches (RBNU; Sitta canadensis), and White-breasted Nuthatches (WBNU; S.
The two breeding season checks were timed to ensure that early nesters, such as Northern Flickers, nuthatches and bluebirds would not be missed, and the second check was late enough to ensure that birds that initiate nests later in the season, such as Lewis's and Red-headed Woodpeckers, would not be missed.
My goal was to evaluate how the White-headed Woodpecker, Hairy Woodpecker, and Northern Flicker use managed Ponderosa Pine forests for breeding in Washington.
I used the same procedure for locating Northern Flicker cavities, with the exception of call playbacks, and I also checked cavities used by flickers in previous years due to their propensity for reusing cavities (Gentry and Vierling 2008).
I sampled vegetation at 77 White-headed Woodpecker, 89 Hairy Woodpecker, and 114 Northern Flicker nests (Table 1).
Compared to the other species, Northern Flickers used Type 1 substrates (Table 1) more frequently ([chi square] = 6.
Northern flickers, pileated woodpeckers and other species were seen swallowing tallow tree seeds in spoil areas from which they later flew into forests.

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