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. 2021 Jul 5;11(7):2010. doi: 10.3390/ani11072010

Table 3.

Definitions of behaviors which achieved a 70% consensus rate for validity and/or practicality in Delphi Survey 1 and progressed to Delphi Survey 2. The valence of affective state represents the majority response by the participants across all families. The taxa to which the behavior is applicable is derived from the results of Delphi Survey 1 and represents the options for ranking presented in Delphi Survey 2.

Descriptor Definition Valence of Affective State Applicable Taxa
Body Condition Score A visual assessment of the amount of fat and muscle covering the bones of the animal Not asked Agamidae, Pythonidae
Body Inflation Intentional, and often repetitive, body inflation and deflation Negative Agamidae, Pythonidae
Calmly Smelling/Tasting
Objects or Air
Flicks tongue, capturing particles in the air Positive Agamidae, Pythonidae
Caudal Luring/Tail Wagging Animal vibrates tail rapidly, moving back and forth on the same plane Positive Pythonidae
Circling Animal pacing around the perimeter of objects or cage mates Negative Agamidae
Cloacal Excretion Defecation and/or urination when handled Negative Chelidae
Clutching Animals gripping at various intensities on handler or object Not applicable Agamidae, Pythonidae
Co-Occupant Aggression Defensive or aggressive biting, chasing, or ramming Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Deformities Malformation of the body Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Dehydration Visible indicators of dehydration Negative Agamidae, Chelidae, Pythonidae
Flattened Body Posture Flattening body against surfaces Neutral Agamidae
Hissing Sound caused by expelling air from the glottic making a small cartilage piece inside the glottis vibrate Negative Pythonidae
Hyperactivity Abnormally high levels of physical activity for the species (often associated with ITB) Negative Agamidae, Pythonidae
Hypoactivity Abnormally low levels of physical activity for the species Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Interaction with Transparent Boundaries (ITB) Persistent attempts to push against, crawl up, dig under/around transparent barriers of the enclosures Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Lameness An abnormal gait/stance of an animal in an attempt to reduce pain. Assumed to relate to ‘slithering’ ability in pythons Negative Agamidae, Chelidae, Pythonidae, Testudinidae
‘Normal’ Skin Quality Skin in good health, with absence of abnormal texture, pigmentation, etc. indicative of active disease process or physiological response to stress Positive Agamidae, Chelidae, Pythonidae, Testudinidae
‘Normal’ Species-Specific Feeding Feeding habits as usual for the species Positive Agamidae, Chelidae, Pythonidae, Testudinidae
‘Normal’ Species-Specific Respiration Normal respiratory rate, absence of abnormal respiratory noises or excessive respiratory effort (e.g., heaving, gasping) Positive Agamidae, Chelidae, Pythonidae, Testudinidae
Ocular and Nasal Discharge A clear or yellow/white discharge from the eyes and/or nostrils Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Physical Damage Damage to the body not necessarily resulting in broken skin, for example grazes and other lesions Negative Agamidae, Chelidae, Pythonidae, Testudinidae
Position of Body The way and manner the reptile has placed their body in an enclosure. If favouring a side or a limb, this may indicate a sign of discomfort Neutral Agamidae
Physical Quiescence Unremarkable species-specific activity, e.g., free from apprehension and fear activities Neutral Agamidae, Testudinidae
Rapid Body Movement Abnormal jerking, locomotion, or jumping Negative Agamidae, Pythonidae
‘Relaxed’ Breathing Unremarkable breathing habits for the species Positive Agamidae, Chelidae, Pythonidae, Testudinidae
Shell Drop Female drops the edge of the shell on the ground during pushing, hooking, or
cloacal probing by the male
Neutral Testudinidae
Shell Lift Female presents the cloacal area to view, to olfact, or for penile insertion, by extending the hind limbs and thereby lifting the posterior part of the shell Positive Testudinidae
Species-Specific ‘Relaxed’ Body Movements and Locomotion Species-specific environmental exploration Positive Agamidae, Chelidae, Pythonidae, Testudinidae
Species-Specific Interest and Alertness Species-specific ‘relaxed’ interest/awareness in proximate or novel objects, ‘relaxed’ visual/olfactory explorations Positive Agamidae, Chelidae, Pythonidae, Testudinidae
Subtle Changes in Body Posture
and Orientation
Stretching out of limbs while basking, relaxed adoption of body angles, and using furnishings Positive Agamidae, Chelidae, Pythonidae, Testudinidae
Swaying (Head Bob) Horizontal movement of the head and neck Neutral Agamidae
Tapping Repeatedly lifting the shells and tapping against a co-occupant’s shell Neutral Testudinidae
Tilting Turn on their side Negative Agamidae, Pythonidae
Trailing One animal follows another, typically the male following the female Positive Agamidae, Testudinidae
Waving Animal lifts its forelimbs; feet lateral to its head Positive Agamidae,
Wounds An injury to living tissue caused by a cut, blow, bite, or other form of impact. Typically resulting in broken skin Negative Agamidae, Chelidae, Pythonidae, Testudinidae