Locomotor Performance in Terrestrial Reptiles

Locomotor performance in terrestrial reptiles encompasses a suite of traits—speed, acceleration, endurance, agility and stability—that determine how individuals interact with their environment, evade predators, secure resources and disperse across landscapes. Performance arises from the coordinated interplay of morphology (limb length, muscle architecture, skeletal structure), physiology (metabolic capacity, muscle fibre type) and biomechanics (centre of mass dynamics, limb–spine coordination). Variation in substrate type, habitat complexity and climatic conditions further modulates locomotive capacity, driving both phenotypic plasticity and evolutionary adaptation. Studies of sprint performance on level and uneven terrain reveal how specialized morphologies enhance energy economy or stability, while investigations of climbing and foraging contexts illustrate adaptive trade-offs between speed and manoeuvrability. Understanding these mechanisms sheds light on the ecological success of reptiles in diverse environments and informs conservation strategies in the face of habitat alteration and climate change.

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Locomotor Performance in Terrestrial Reptiles publication trend

The graph below shows the total number of articles in locomotor performance in terrestrial reptiles across all publications each year (not limited to Nature Index journals).

Technical terms

Centre of mass (CoM): The point at which the mass of the body is considered to be concentrated for the purposes of analysing movement and stability.

Cost of transport: The energy expended per unit body mass to move a given distance, used to compare the efficiency of different gaits or substrates.

Pareto-optimal: A state in which multiple performance criteria (e.g. speed, stability, energy economy) are balanced such that no single criterion can be improved without compromising another.

Speed–manoeuvrability trade-off: The inverse relationship between an animal’s maximum locomotor speed and its ability to execute sharp turns or precise movements, often mediated by body design and muscle control.

Morphological plasticity: The capacity of an organism’s form (e.g. limb proportions, skeletal structure) to change in response to environmental or developmental conditions without genetic alteration.

References

1. Coordinating limbs and spine: (Pareto-)optimal locomotion in theory, in vivo, and in robots. npj Robotics (2024).
2. Small vertebrates running on uneven terrain: a biomechanical study of two differently specialised lacertid lizards. Scientific Reports (2019).
3. Enhanced locomotor performance on familiar surfaces is uncoupled from morphological plasticity in Anolis lizards. Journal of Experimental Zoology Part A Ecological and Integrative Physiology (2020).
4. Functional and Environmental Constraints on Prey Capture Speed in a Lizard. Integrative Organismal Biology (2020).