For the second month in a row, a contingent of toy ducks has appeared mysteriously on the streets of Noe Valley.

On Friday morning, reader Jean F. used Hoodline's tipline to report a line of ducks headed down 22nd Street, one of the city's steepest hills, with more gathered near the corner of 22nd and Church.

Ducks lined up on 22nd Street. | Photo: Jean F./Hoodline Tipline

Via Twitter, Carrie Kelly reported that the ducks lined up near Mona Caron's 2006 botanical mural outside the Theresa S. Mahler Child Development Center at 22nd & Church were individually numbered.

Photo: Jean F./Hoodline Tipline

It's a rubber duck mystery. Anyone know why there are blocks of rubber ducks w numbers under each in Noe Valley? #rubberduckies pic.twitter.com/WKdpuJK4U7 — Carrie Kelly (@carriekellysf) June 24, 2017

Reader Corey F. let us know that the ducks also appeared at the J-Church stop near 22nd and Church.

Photo: Corey F./Hoodline Tipline

On May 21, a large group of similar ducks landed a few blocks away at the corner of Castro and 21st Streets. In that incident, someone arranged more than 150 bath toys to spell "SIMON" on the sidewalk. No one has claimed responsibility for either group of ducks (which are properly referred to as a "safe" while on land).

Thanks again to tipster Jean F. and Corey F.!

Have you come across something unexpected? Text a horizontal photo and your tip to 415-200-3233, and we'll look into it. If we use your information in a story, we'll give you credit.

