Mallards are a very common duck that are easy to find. Find out why Bill thinks they may be an invasive species.
Our sources for this episode include:
- Unflappable Facts About Mallards
http://mentalfloss.com/article/78330/15-unflappable-facts-about-mallards - Mallard duck facts
http://www.softschools.com/facts/animals/mallard_duck_facts/587/ - Mallard
https://www.allaboutbirds.org/guide/Mallard/lifehistory
