That's an excellent question! Many homeowners and property managers struggle with wildlife getting into their outdoor trash. Fortunately, modern outdoor trash cans have evolved significantly with several effective deterrent features.
Several models feature locking lids that require human hands to open, preventing birds and raccoons from simply lifting them. Others incorporate weight-sensitive mechanisms that only release when they detect sufficient pressure - something most animals can't accomplish. Some premium bins use scent-blocking technology and tight-sealing gaskets that minimize food odor escape, which is what attracts animals in the first place.
I've personally found that trash cans with pedal-operated mechanisms work well against birds, as they can't perch and trigger the opening mechanism like they might with touch-free sensor models. For areas with particularly persistent wildlife, look for bins with reinforced latches and smooth, rounded surfaces that prevent animals from gaining leverage to pry them open.
The key is choosing trash cans without obvious footholds or gripping points around the lid area. Many animals are incredibly clever, so the most effective solutions make it physically impossible for them to access the contents rather than just creating barriers they can eventually overcome.