River crappies love current breaks, and current strength often determines how large a current break must be to attract fish. In rivers with minimal current, such as the Rideau River Chain in Ontario, they occupy the main river channel most or all of the year. Guide Jim McLaughlin, who works the Rideau, says crappies often position outside bridge abutments and pilings on the upstream side right in the main river channel during summer. But as Capps notes, only crazy crappies try to hold in the main flow of the lower Mississippi most of the year.

In some slow-moving rivers, crappies can use weedbeds as current breaks in the main channel. In large, powerful rivers, they’re rarely found in the main channel, no matter how large the current breaks are. In northern rivers, the fish leave current areas entirely, moving as far from them as possible when the water dips below 50°F at the surface. In the South, they might stay in current areas all winter, depending on current strength and water temperature. In the North, crappies move miles to find 20 feet of water to hole up in for winter. In the South, 10-foot depths can be acceptable all winter long.

Different fish? No. Crappies everywhere are the same fish with the same needs, but different climates modify those needs. The natural range of crappies, from south Florida into Canada, covers a wide spectrum of climates, from subtropical to boreal. Crappies range through disparate river systems and topography, where varying conditions force different responses to different problems. Conditions change with latitude, climate, and terrain, but our flat-sided friends have built-in attitude adjustment capabilities that allow them to thrive in all kinds of rivers, lakes, and climates.