Monday, December 4, 2023

Murmurations

Apologies for not including my murmuration project on this blog.  Every year from October through April, the Sand Hill cranes call my location in southeastern arizona usa, home.  They fly in huge 'V' shaped murmurations, and for years I've been wanting to 'do' something with this.  It's a beautiful sight, and I'd like to understand better how they fly so well together and how they communicate between one another.

Anyhow I've been stuck for several years, but a couple months ago I stumbled across work being done by Doris Mitsch.  Her work showed me a clear path onto 'something' but I'm yet to be exactly sure what.  At the moment, I'm just collecting data and playing with my image processing code that generates long exposure images of the videos that I'm taking of these birds in flight.

There seem to be two primary modes of flight: straight ahead in their typical 'V' shapes, and a rotating action they do mid-day that I'm calling 'meetings' or conferences.  During these meetings they fly in tight circles and talk very loudly.  After a few turns a group breaks off and everyone else follows them back into their 'V' formations.  Fun to watch, and currently my software is generating these long exposure images.

Here are some examples, and there are some interesting videos on my youtube channel.


there were a couple of crows or ravens flying around too.








wiggly paths:


I've used chatGPT to give me some suggestions for research topics, and this is what it came up with (I asked for 20 topics):

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User
you are an expert in the murmurations of sand hill cranes.  Please recommend twenty lines of scientific investigation about the murmurations of sand hill cranes
ChatGPT
Studying the murmurations of Sandhill Cranes is a fascinating and complex field. Here are twenty lines of scientific investigation that can be explored:

Behavioral Patterns: Analyzing the specific behaviors exhibited during murmurations and understanding their social or survival functions.

Communication Mechanisms: Investigating how cranes communicate during these gatherings, focusing on both auditory and visual signals.

Environmental Influences: Studying how different environmental conditions, such as weather or habitat changes, affect murmuration patterns.

Migration and Murmurations: Understanding how migratory patterns influence murmuration behaviors, timings, and locations.

Population Dynamics: Examining the relationship between crane population sizes and the scale or frequency of murmurations.

Predator-Prey Interactions: Investigating if and how murmurations function as a defensive mechanism against predators.

Nutritional Aspects: Understanding the feeding behaviors and nutritional intake during murmuration periods.

Breeding and Murmurations: Studying the role of murmurations in mating and breeding behaviors of Sandhill Cranes.

Social Hierarchies: Analyzing if there are any observable social structures or hierarchies within murmurations.

Age-Related Behaviors: Examining differences in murmuration participation or behavior based on the age of the cranes.

Genetic Factors: Investigating whether genetic factors influence participation in, or the behavior during, murmurations.

Physiological Stress Responses: Studying the physiological impacts, such as stress responses, of cranes during large gatherings.

Aerodynamic Aspects: Analyzing the flight patterns and aerodynamics involved in murmuration formations.

Impact of Human Activities: Assessing how human activities, like agriculture or urbanization, impact crane murmurations.

Conservation Implications: Understanding how knowledge of murmurations can contribute to effective conservation strategies for Sandhill Cranes.

Disease Transmission: Investigating the role of murmurations in the spread or control of diseases among crane populations.

Acoustic Analysis: Studying the sounds made during murmurations and their potential roles or meanings.

Technological Monitoring: Utilizing modern technologies like drones or satellite tracking to study murmurations in greater detail.

Comparative Studies: Comparing murmuration behaviors of Sandhill Cranes with other species to identify unique or common patterns.

Climate Change Impact: Researching how changing climate conditions are affecting the murmuration behaviors of Sandhill Cranes.

Each of these lines of inquiry could contribute significantly to our understanding of the complex social and ecological aspects of Sandhill Cranes' murmurations.

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I then went on:

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User
I'm particularly interested in the aerodynamic aspects -- will you please expand upon this and present me with twenty suggestions for research projects
ChatGPT
Focusing on the aerodynamic aspects of Sandhill Crane murmurations, here are twenty research project suggestions that delve into various facets of this intriguing phenomenon:

Formation Flight Analysis: Study the aerodynamic benefits of different flight formations during murmurations, such as V-formations or echelons.

Energy Efficiency: Investigate how different murmuration patterns affect the energy expenditure of individual cranes during flight.

Wingtip Vortex Interactions: Analyze the interactions of wingtip vortices between individual cranes in a murmuration and how this influences flight efficiency.

Maneuverability in Murmurations: Study how cranes maneuver within a murmuration, focusing on the aerodynamic mechanisms that allow for quick and coordinated changes in direction.

Wind Tunnel Experiments: Conduct wind tunnel experiments with crane models to study the aerodynamic forces at play during murmurations.

Computational Fluid Dynamics (CFD) Models: Develop CFD models to simulate the airflow around and within crane murmurations, providing insights into the aerodynamic interactions.

Flight Speed and Aerodynamics: Examine how flight speed affects the aerodynamic efficiency of cranes during murmurations.

Altitude Effects on Flight Dynamics: Research how different altitudes, with varying air densities, affect the aerodynamics of crane murmurations.

Thermal Soaring and Murmurations: Investigate the role of thermal currents in the aerodynamics of murmurations, especially in relation to soaring behavior.

Feather Morphology and Aerodynamics: Study the relationship between feather morphology of Sandhill Cranes and their aerodynamic performance during murmurations.

Aerodynamic Noise Analysis: Analyze the aerodynamic noise generated during murmurations and its potential communication roles.

Impact of Weather Conditions: Investigate how varying weather conditions, like wind speed and direction, affect the aerodynamics of murmurations.

Energy Transfer Within Flocks: Examine how energy is transferred between individuals in a murmuration, particularly through aerodynamic interactions.

Landing and Takeoff Dynamics: Study the aerodynamics involved in the coordinated takeoff and landing behaviors during murmurations.

Aerodynamic Benefits of Synchronization: Research how synchronized movements in murmurations contribute to aerodynamic efficiency.

Individual vs. Group Aerodynamics: Compare the aerodynamics of solitary crane flight to that within a murmuration to understand the benefits of group flight.

Stress Analysis on Wings during Murmurations: Conduct biomechanical studies to understand the stress and strain on crane wings during different murmuration maneuvers.

Use of Drone Technology: Employ drones to mimic crane flight patterns in murmurations and study the resulting aerodynamic data.

Evolutionary Aspects of Aerodynamic Efficiency: Explore the evolutionary development of aerodynamic efficiency in murmurations as a survival trait.

Impact of Age and Physical Condition: Research how the age and physical condition of individual cranes affect their aerodynamic roles and capabilities within a murmuration.

Each of these projects would contribute to a deeper understanding of the complex aerodynamics involved in Sandhill Crane murmurations, providing insights into both the behavior of these birds and the broader principles of flight in flocking birds.

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