What is Street Creatures?  This is the game I run on Twitter every Friday. I’ve
collected all the past quizzes here in one place so you can either relive them, or play
them for the first time.

How does it work?  Provided are four, seemingly unrelated clues, that are all
connected by a wild organism that can be found in a city. Look at the four clues,
do some research, and when you think you’ve figured it out, click on ‘Answer’
to reveal what connects the clues, and how they are connected.

Follow me on Twitter to play #StreetCreatures live every Friday at 9am PST.

Quiz #13 Clues

Delayed implantation

Answer (Don't click until you've solved it)

River Otter (Lontra canadensis)


Yes, they are found in Canada, but it’s also in their name, Lutra canadensis. Oh Canada!


Otters are famous for their rambunctious play and one of the ways they do this is by sledding, or tobogganing in the snow.

Learn more.


River otters have places they they use it to roll/rub to keep their fur clean. They also use these places as an outhouse and mark it with urine and their unique, tar-like poo. Unsurprisingly, this patch of land dies and turns brown.

Delayed implantation:

The fertilized egg of a river otter doesn’t attach to the uterine wall immediately and but waits some time. This means the gestation of river otters is 285 to 375 days.

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