In the supermarket last night I walked past the egg display and did a double take. Among various different brands of eggs was one proudly announcing itself on the box as "HENS Eggs" (capitalised as shown). Just in case someone needed to know. Did they think we didn't know where they came from? Dinosaurs? Turtles? Unlikely to be quails' eggs as that supermarket isn't as up-market as all that.
(You can get goose and duck eggs in the UK but only direct from the farmer and never in supermarkets)