Some animals have a limited or virtually non-existent sense of smell.
However, it's important to note that all animals have some degree of olfactory capability, as it is a crucial sense for survival and navigation in the natural world.
Nevertheless, there are some examples of animals that have significantly reduced or compromised sense of smell compared to others.
Humans
Compared to many other animals, humans have a relatively poor sense of smell.
While we can detect certain odors, our olfactory capabilities are limited compared to other creatures.
Marine Mammals
Marine mammals like dolphins and whales have a reduced sense of smell compared to their terrestrial counterparts.
This is because their primary sensory focus is on echolocation (sound-based navigation) rather than relying heavily on their sense of smell.
Birds
Birds generally have a weaker sense of smell compared to mammals.
While some birds like vultures have a well-developed olfactory sense to locate carrion, many others rely more on their vision for hunting and navigation.
Reptiles
Most reptiles have a limited sense of smell.
While some snakes have a keen sense of smell to track prey, many reptiles primarily rely on their other senses like vision and heat detection.
Insects
Insects have olfactory receptors, but their sense of smell is quite different from mammals.
They use specialized antennae to detect chemical cues, such as pheromones, for communication and finding food.
