OK Marci I'll use a slightly smaller picture.
For your information the pics you are looking at are 1024 pixels wide and and approximately 685 pixels tall. They should fit on any display with XGA (1024) or better resolution.
XGA displays have been around since about 1990 so there are few of the lower resolution VGA's left. Most modern displays are far better than 1024. The notebook I'm using right now is 1440 x 900 for example.
Is it possible that you have your display resolution set very low in order to get a larger font size on print? If so you might consider raising the resolution to at least 1024 x 768. If you are on a Windows machine look in Control Panel or on a Mac in Settings to find display resolution adjustments.
I'm going to put a smaller image (640 x 428) here for you to test. Let me know how this works for you and approximately how much of your screen area it takes up....like 25%, 50%, 100%...just guess.
Lyc macrophylla ssp macrophylla LUR_5493 by
kentucky4, on Flickr