Insect foraging cognition
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Insect foraging cognition is the use of an insect's cognitive abilities to find food. Insects inhabit many diverse and complex environments. Cognition shapes how an insect comes to find its food. The particular cognitive abilities used by insects in finding food has been the focus of much scientific inquiry.[1] The social insects are often study subjects and much has been discovered about the intelligence of insects by investigating the abilities of bee species.[2][3] Fruit flies are also common study subjects.[4]
Learning biases
Through learning, insects can increase their foraging efficiency, decreasing the time spent searching for food which allows for more time and energy to be invested in other fitness related activities, such as searching for mates or hosts.[5] Depending on the ecology of the insect, certain cues may be used to learn in identifying food sources more quickly. Over evolutionary time, insects may develop evolved learning biases that reflect the food source they feed on.[6]
Biases in learning allow insects to quickly associate relevant features of the environment that are related to food. For example, bees have an unlearned preference for radiating and symmetric patterns — common features of natural flowers bees forage on.[7] Bees that have no foraging experience tend to have an unlearned preference for the colours that an experienced forager would learn faster. These colours tend to be those of highly rewarding flowers in that particular environment.[8]
Time-place learning
In addition to more typical cues like color and odor, insects are able to use time as a foraging cue.[9] Time is a particularly important cue for pollinators. Pollinators forage on flowers which tend to vary predictably in time and space, depending on the flower species, pollinators can learn the timing of blooming of flower species to develop more efficient foraging routes. Bees learn at which times and in which areas sites are rewarding and change their preference for particular sites based on the time of day.[10]
These time-based preferences have been shown to be tied to a circadian clock in some insects. In the absence of external cues honeybees will still show a shift in preference for a reward depending on time strongly implicating an internal time-keeping mechanism, i.e. the circadian clock, in modulating the learned preference.[9]
Moreover, not only can bees remember when a particular site is rewarding but they can also remember at what times multiple different sites are profitable.[10] Certain butterfly species also show evidence for time-place learning due to their trap-line foraging behaviour.[11] This is when an animal consistently visits the same foraging sites in a sequential manner across multiple days and is thought to be suggestive of a time-place learning ability.
Innovation capacity
Insects are capable of behavioral innovation, creating new or modified learned behavior not previously found in the population.[13] Innovative abilities can be experimentally studied in insects through the use of problem solving tasks.[14] When presented with a string-pulling task, many bumblebees cannot solve the task, but a few can innovate the solution.[12]
Those that initially could not solve the task can learn to solve it by observing an innovator bee solving the task. These learned behaviors can then spread culturally through bee populations.[12] Studies in insects have begun to look at what traits (e.g. exploratory tendency) predict the propensity for an individual insect to be an innovator.[15]
