What are blue Raid Eggs in Pokemon GO?

During the recent Community Day event in Pokemon GO, players noticed an unusual type of egg appearing in Raid Spots.

Nidos Argentina on X: Updated Raid Bosses chart! Kanto event is

June 2023 Community Day Guide

What are blue Raid Eggs in Pokemon GO?

Here Are Few Steps to Know Raid and Raid Eggs In a Faraway Gyms in

The 4 star raid egg on the Dieno Community day web page shows a

Pokemon Go: How to Play Raid Battles, Best Pokemon for Fighting Bosses

Ultimate Guide To Prepare For Legendary Pokemon Raids - Pokemon Go

Amazing! New Special raid egg in pokemon go.

Legendary Pokemon - Pokemon GO Guide - IGN