NOTES ON HOLE SIZE: 1  per Bergmann's rule, some species of birds may be larger in colder climates-e.g., a Canadian starling may be bigger than a Florida starling, thus the Canadian bird might not be able to fit in a certain hole size that its southern version could squeeze into.
A heart palpitation is the sensation that your heart has skipped a beat or added an extra beat. It may feel like your heart is racing, pounding, or fluttering. You may become overly aware of your heartbeat. This sensation can also be felt in the...
Heart palpitations usually occur sporadically over a period of two to three months. Heart palpitations may accompany hot flashes, another common symptom of menopause, increasing your heart rate between 8 and 16 beats a minute. Some women have been known to experience heart rates of up to 200 beats per minute when experiencing heart palpitations.