Temporal and Individual Variation in Offspring Provisioning by Tree Swallows: A New Method of Automated Nest Attendance Monitoring
Figure 5
Variation in the number of times parents feed chicks per day and the relationships of feeding rate, duration of feeding, and number of times parents feed chicks.
a) Histogram showing variation in the average number of times chicks were fed per day by 17 different pairs of birds. The mean number of times chicks were fed per day by all pairs is 317.4. b) The number of times chicks were fed each day was strongly predicted by the rate at which parents fed chicks. c) The number of times chicks are fed on average is negatively related to the average amount of time pairs spent feeding chicks in a day. d) There is also an inverse relationship between the number of minutes birds spent feeding their chicks and the rate at which they fed them.