The Hemlock Woolly Adelgid. The Hemlock Woolly Adelgid has been found in the town of Niskayuna at certain residences and in the Lisha Kill.

The Emerald Ash Borer. The Emerald Ash Borer has been found in certain locations in the town of Niskayuna.

Oak Wilt. Oak Wilt has been found in neighboring communities such as Glenville, NY.