I help manage a small conservation garden for a water district on the NW side of Houston (Cypresswood Water Conservation Garden). We have two artificial (liner) ponds on the site for the wildlife. The property is not near any other bodies of water (Cypress Creek is about 3/4 of a mile away). They were originally stocked w/ Gambusia to maintain mosquito control. During my spring cleanout the other day, I discovered two other species in one of the ponds. I think one is Bluefin Killifish and the other is some kind of Shiner. I would really appreciate any help anyone could give. This property is open to the public, so it's possible someone decided to "gift" them to us. But I need to know if either/both species could be found in local waterways and be brought in by birds.
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