1 Normally flickers lay 6 or 7 eggs.  Cowbirds (which parasitize the nests of other birds) usually lay about six eggs (one each day) in different nests, wait a few days, and then start again. They may lay more than 11-20 eggs per season. A captive female was recording laying 77 eggs, 67 of those in a continuous sequence.
What is nystagmus? Nystagmus is an involuntary condition in which the eyes make rapid, repeated, uncontrolled movements. These eye movements may be in any direction including horizontally, vertically, or rotationally (in a circle). Many people with nystagmus do not experience visual symptoms.
Horizontal Gaze Nystagmus. Nystagmus is the medical term used to describe the involuntary jerking of the eyeballs. When someone is intoxicated by alcohol and/or certain drugs, this jerking becomes more pronounced. As such, the horizontal gaze nystagmus test is used by law enforcement agents to evaluate an individual's nystagmus in order to determine if probable cause exists for a drunk-driving arrest.