What Trend in the Monarch Population Does the Graph Show

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The Western Monarch Thanksgiving & New year’southward Counts

The Western Monarch Thanksgiving and New Yr’due south Counts are the production of almanac monitoring efforts by volunteer community scientists to collect data on the condition of monarch populations overwintering along the California and Northern Baja, Mexico, coast (and a few sites from inland areas of California and Arizona). Thanks to the extraordinary efforts of these volunteers, nosotros have 25 years of information demonstrating that western monarchs have undergone a more 95% decline since the 1980s.

The information collected by volunteers are compiled and entered into the Xerces Order’due south Western Monarch Overwintering Sites Database which too includes many historic counts and survey efforts. Contact
[e-mail protected]
if you lot are interested in obtaining a re-create of the entire database.

You lot can download the Thanksgiving and New year’s day’s Count information for every year by clicking on the PDF or excel links below. The graphs of the Thanksgiving and New year’s day’s Count totals and monitoring efforts are updated each yr in January and February respectively.

Results from the 2021 Western Monarch Thanksgiving Count are bachelor!

Western Monarch Thanksgiving Count Data 1997-2021 in pdf and Excel. See our Weblog and Press Release for the 2021 Western Monarch Thanksgiving Count.

*Note:
If yous are a researcher using this information, please exist sure you periodically bank check back to make certain you have the well-nigh recent version of the data.

Data Citation:
Xerces Society Western Monarch Thanksgiving Count. 2022. Western Monarch Thanksgiving Count Data, 1997-2021. Bachelor at www.westernmonarchcount.org.

Results from the 2021-2022 Western Monarch New Year’s Count are available beneath.

See our blog about the 2021-2022 New year’s Count! This was the sixth annual New year’s day’s Count and volunteers visited a record number of sites. A total of 209 sites were surveyed, totaling 151,168 collywobbles counted in the Due west. As shown in the graph below, 195 sites were monitored during
both
the Thanksgiving and New Year’s Count. The comparison between the two counts reveals an average decrease of ~38% over the winter season, which aligns with the trends we usually witness.

These two counts are only possible because of the incredible regional coordinators and volunteers that spend countless hours surveying overwintering sites each year. Thanks to all that participate in this invaluable community scientific discipline project! The data from 2022 is available in pdf and excel.

Data Citation:
Xerces Guild Western Monarch New Year’s Count. 2022. Western Monarch New year’s Count Data, 2016-2022. Bachelor at www.westernmonarchcount.org.

Previous years data:

2020/21: Click on the following links to read almost the 5th almanac New Year’southward Count, encounter the graph, or check out the data in pdf or excel format.

2019/xx: Click on the following links to read about the fourth annual New year’southward Count, come across the graph, or check out the data in pdf or excel format.

2018/nineteen: Click on the following links to read about the third almanac New Year’s Count, run into the graph, or cheque out the data in pdf or excel format.

2017/eighteen: Click on the following links to read about the second almanac New year’s day’due south Count, encounter the graph, or check out the information in pdf or excel format.

2016/17: Click on the following links to read nearly the first New Year’s Count or to see the data in pdf or excel format.