Bats!

Yup, huge ones. Tons of them. In Sydney.

These pics don't do it justice, but.. it's pretty cool.

These pics don't do it justice, but every night around sunset, there are thousands of bats flying around Sydney...

So big they are called flying foxes.

http://www.faunanet.gov.au/wos/factfile.cfm?Fact_ID=307