Google Trends search interest before and after a country’s first Covid-19 lockdown.

Notes: This figure shows the estimated change in search intensity for the term "bird feeder," "bird food," and "bird bath" before and after Covid-19 lockdowns relative to the week before the lockdown started. We estimate this change in search intensity based on Eq (1) using data from Google Trends. The search intensity represents people’s indexed search frequency for the three terms related to bird feeding. Each point is the point estimate of the change in bird feeding interest for the period relative to the country’s first lockdown from countries with sufficient search volume for each term. The number of countries that were included for each search term: bird feeder (101), bird food (75), and bird bath (55). A list of countries included in the analysis is available in Table A3 in S1 File Column (1)-(3). A line connects each point estimate. The shaded area is the 95% confidence interval.