Does the chance of larger species visiting the feeding station change day to day?

Choose What To Display

A bar graph with four different colored bars that each refer to a species percent chance of arrival: Blue Jay is light-green, Northern Cardinal is dark green, Red-bellied Woodpecker is orange, and Red-winged Blackbird is light blue. The date on the horizontal axis is from 03/31 to 04/14 and the percent chance on the vertical axis is from 30 to 100. The Blue Jay percent chance varies from just under 60 to 86 across the sampling period (one drop is 39.29% on 04/04) with no obvious pattern. The Northern Cardinal is at 100% on 03/31 and then decreases to 71.43% on 04/04 and then increases back to 85-95% for the rest of the sampling period. The Red-bellied Woodpecker percent chance varies from 63-74% 03/31 to 04/06 and then decreases to 58-63$ from 04/07 to 04/12 before jumping back up to 72% 04/13-04/14. There is no obvious pattern for the Red-winged Blackbird, varying from 88 to 100% across the sampling period.

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Reading the Graph: Did the chance that a species arrive at the feeder during a half-hour time interval change day to day? How do species compare? Find out and see if you notice any patterns by simplifying the graph with the interactive feature. Look for the checked boxes under “Choose What to Display,” and toggle on and off the different species.

Notes: Each day is split into 30-minute intervals from 5:00 to 21:00 (i.e. 9:00 pm), and the height of each bar is the percentage chance that a species will arrive during each of those time intervals that was watched for at least 15 minutes. Each color refers to one of the four larger focal species. The four smaller focal species (American Goldfinch, Black-capped Chickadee, Tufted Titmouse, White-breasted Nuthatch) are featured in another graph. Be careful comparing different graphs because the values on the vertical axis will change.

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