Maybe keep the bugs to yourself for the next 24 hours or so
Today is truly the Day of Blathers, because it's International Museum Day! Naturally, Animal Crossing: New Horizons is marking the occasion with a special event that runs from now through the end of the month, complete with prizes for those who participate.
Nintendo originally outlined plans for the event along with the April update, and the centerpiece of it all is a Stamp Rally. For a limited time, players can view fish, insects (THOSE VILE, WRETCHED THINGS!), and fossils while collecting stamps throughout various museum exhibits.
As long as you have the museum upgraded from a tent, all you have to do is talk to Blathers, visit and interact with three exhibits in the assigned section, and turn in the completed card to Blathers to get your reward. You can easily complete all three rallies while International Museum Day is still in effect, and you'll get plaques as rewards for your effort.
Just please, please consider giving poor Blathers a break today with the insects. He just can't anymore.