Altitudinal differences in foraging decisions under predation risk in great tits

Foraging decisions under risk of predation are crucial for survival as predation risk can contribute to a reduction of food intake over time leading to a trade-off between starvation and predation. Environmental variation can provoke changes in food accessibility or predation risk that will in turn affect foraging decisions. Specifically, less predictable or harsher environments, such as those found at high elevation, should lead to more risk-prone foraging in order to prevent risk of starvation, but empirical confirmation of this hypothesis is lacking. In the current study, we used video playbacks combined with an automatic feeder to measure continuous foraging choices between control and predator videos by wild great tits originating from high and low elevations and tested under controlled conditions. Great tits discriminated between two conditions representing differences in predation risk and visited the feeder less frequently when a predator was shown. Moreover, we found that birds..., , , # Altitudinal differences in foraging decisions under predation risk in great tits

These datasets are used to investigate altitudinal differences in foraging decisions under predation risk in great tits.
Three successive datasets were used to that aim:

**df.PredAbundance**
Measurement of predator abundance per elevation using camera trap
Presentation of variables:

* Elevation: elevation above see level in meters of the location of the camera trap
* ElevationClasses: elevation sorted by category: 100-600; 600-1000; 1000-1500
* PredatorType: type of predator identified on cameratrap, either avian (AvianPred) or mammal (MammalPred)
* CamTrap: identity of the camera trap used.
* IndividualCount: number of predators identified
* Year: year of measure of the predator abundance (either 2016 or 2017)

**df.PredElevation**
Measurement of the number of visits to a feeder depending on video playbacks for various great tits
Presentation of variables:

* ID: Bird identity number com...