What does eBird say about Cassin's Finch and Evening Grosbeak numbers now?

[David Suddjian]

Curious about the current peaks in occurrence for Cassin's Finch and Evening Grosbeak, I took a look at the graphs for both species for the counties of the Front Range and central mountain region of Colorado. Below are graphs of frequency of occurrence on eBird checklists for 2018-2022. The end of 2022 shows where we are at now relative to the other recent years. 2023 is not yet showing on the graphs until after this week.

Frequency is very high now for both species compared to recent years. The graphs for abundance show the same picture. 

I presume the Christmas Counts as a whole will reflect something similar.

Figure 1. Cassin's Finch frequency in eBird for the Front Range and central mountain counties, 2018-2022

Figure 2. Evening Grosbeak frequency in eBird for the Front Range and central mountain counties, 2018-2022

David Suddjian

Ken Caryl Valley

Littleton, CO