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

Choose What To Display

A bar chart with four different colored bars, each color referring to a species: yellow-green is American Goldfinch, green is Black-capped Chickadee, orange is Tufted Titmouse, and light blue is White-breasted Nuthatch. Date is on the horizontal axis from 03/31 to 04/14. Percent chance that a species arrives is on the vertical axis from 0 to 100. The American Goldfinch is at 27.27% on 03/31 and increases to 70% on 04/06 before decreases down to 10.71% on 04/10 and increases slightly again to just under 30% on 04/14. The Black-capped Chickadee fluctuates from about 92% to 96% across the dates except it decreases to 8408^ on 04/06, 04/11 and 04/13. The Tufted Titmouse is highest at the beginning of the sampling period (about 80-90%) and steadily decreases to about 55-65% 04/10 to 04/14. The White-breasted Nuthatch has a similar pattern to the Tufted Titmouse: starts out with highest percentage chance at the beginning of the sampling period 55-80% and decreases to 35% 04-04/13 before jumping back up to 55% 04/14.

Click To Download

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 smaller focal species. The four larger focal species (Blue Jay, Northern Cardinal, Red-bellied Woodpecker, Red-winged Blackbird) are featured in another graph. Be careful comparing different graphs because the values on the vertical axis will change.

Share what you see or any questions you might have in the forum below!