That's an excellent and very practical question for park maintenance! A standard open bin is basically a dinner invitation for urban wildlife. For a city park, I'd highly recommend looking for bins with these key features to minimize pest attraction:
First, the lid is non-negotiable. Opt for bins with tight-fitting, durable lids. Spring-loaded or pedal-operated lids are fantastic because they close automatically after use. Avoid simple flip lids that can be left open or nudged aside by clever animals.
Material matters too. Stainless steel or heavy-duty, smooth plastic is best. These materials don't absorb odors as easily as porous ones, and they are much harder for rodents to gnaw through. Avoid bins with textured surfaces that pigeons can easily grip on.
Consider the design. A streamlined bin without ledges, overhangs, or flat tops prevents pigeons from landing and roosting. An enclosed chute for depositing trash, rather than a large open mouth, is also a great deterrent.
Placement and maintenance are just as crucial. Place bins away from trees and benches to reduce easy access and perching spots. Most importantly, ensure a consistent and frequent emptying schedule. No bin, no matter how well-designed, will be effective if it's overflowing.
Look for models specifically marketed as "animal-proof," "rodent-resistant," or "vandal-proof," as they often incorporate these features. While they may have a higher upfront cost, they save money and hassle in the long run by reducing scavenging, spilled litter, and the health risks associated with pests. A cleaner park is better for everyone!