As spring heats up, so too can backyard rivalries for food, nesting spots and space. Take time to prepare for potential conflicts (or remember last year’s issues) before they turn into this year’s headache.

Feeder Feuds: Should your feeder become overrun with unwanted squirrels or blackbirds, consider switching the location or food offerings. If the problem persists — or black bears are a factor — it may be time to temporarily shut down a feeding station (and keep all pet food indoors).

Nest Box Wars: Bluebirds and chickadees have likely staked an early claim on man-made nest boxes, but nonnative species like starlings and house sparrows may try to move in. Take a peek into vacant and occupied boxes every few days to check on the nesting progress and remove any starling or sparrow nest materials before they take hold. *If wasps are the unwanted tenant, a thin layer of Vaseline on the inside roof can discourage nest building and leave the box available for cavitynesting songbirds.