Predation by squirrel monkeys and double-toothed kites on tent-making bats.

Area of Science:

• Behavioral Ecology
• Animal Behavior
• Predator-Prey Dynamics

Background:

• Phyllostomid bats construct specialized roosts using modified leaves.
• Squirrel monkeys (Saimiri oerstedi) exhibit foraging behaviors targeting these bat roosts.
• Coordinated foraging between predators can influence prey vulnerability.

Purpose of the Study:

• To investigate the predatory interactions between Central American squirrel monkeys and tent-making bats.
• To determine the effectiveness of squirrel monkeys in capturing bats from diurnal roosts.
• To assess the combined impact of squirrel monkey and double-toothed kite predation on bat populations.

Main Methods:

• Observational studies of squirrel monkey foraging behavior at bat roosts.
• Analysis of visual and manual search strategies employed by monkeys.
• Monitoring of bat capture success rates, differentiating between adult and juvenile bats.
• Documentation of predation events involving double-toothed kites.

Main Results:

• Squirrel monkeys successfully locate and search bat tents for bats and insects.
• Adult male squirrel monkeys demonstrate the highest bat capture rates.
• Juvenile, nonvolant bats are more susceptible to monkey predation than adult bats.
• Double-toothed kites prey on bats that evade squirrel monkeys, often in association with monkey troops.

Conclusions:

• Squirrel monkeys are significant predators of tent-making bats, targeting specific roost types.
• Bat roosting behavior and developmental stage influence predation risk.
• The synergistic predation by squirrel monkeys and double-toothed kites represents a substantial mortality factor for these bats.