Exotic companion animal pathology

Drury R. Reavill Pathology Database at UC Davis

Decades of biopsy, necropsy, and cytology records from exotic companion animals — birds, reptiles, small mammals, amphibians, and fish — searchable in one place.

Search the database →Explore epidemiology of diseases in exotics
85,734
Case records
84,190
Pathology reports
1,544
Cytology cases
2,158
Species & breeds

Records by taxonomic class

70,672 records with a recorded taxon; 15,062 without one are not shown.

Birds: 52.9%Mammals: 30.0%Reptiles: 11.1%Fish: 3.6%Amphibians: 2.3%Invertebrates: 0.1%53%30%11%70,672classified records
  • Birds37,38952.9%
  • Mammals21,19530.0%
  • Reptiles7,82011.1%
  • Fish2,5513.6%
  • Amphibians1,6192.3%
  • Invertebrates980.1%

Orders within each class

Birds

37,389 records
  • Psittaciformes (parrots)28,699
  • Passeriformes2,421
  • Anseriformes (waterfowl)1,348
  • Columbiformes (pigeons & doves)1,205
  • Galliformes1,178
  • Raptors713
  • Unspecified birds553
  • Ciconiiformes298

+ 16 more orders in the database

Mammals

21,195 records
  • Carnivora (ferrets & relatives)6,154
  • Rodentia5,493
  • Lagomorpha (rabbits)4,701
  • Primates959
  • Insectivores (hedgehogs & allies)793
  • Carnivora (cats)715
  • Carnivora (dogs)675
  • Marsupials643

+ 11 more orders in the database

Reptiles

7,820 records
  • Lizards (Sauria)3,675
  • Snakes (Serpentes)2,827
  • Chelonians (Testudines)1,243
  • Crocodilians65
  • Unspecified reptiles10

Fish

2,551 records
  • Bony fish2,264
  • Sharks & rays287

Amphibians

1,619 records
  • Anura (frogs & toads)1,387
  • Caudata (salamanders)232

Invertebrates

98 records
  • Cnidarians80
  • Arthropods11
  • Echinoderms7

Body systems

Diagnoses classified by organ system

  • Skin8,772
  • Digestive8,555
  • Systemic4,718
  • Respiratory3,194
  • Urinary2,146
  • Reproductive1,884
  • MusculoSkeletal1,499
  • Miscellaneous1,433
  • CardioVascular1,141
  • Immuno947

Disease processes

Tumors, infections, and other classified processes

  • Inflammatory11,252
  • Tumor8,716
  • Infection5,836
  • Degenerative3,318
  • Metabolic1,093
  • Metabolic (liver)664
  • Congestion654
  • No Lesion Recognized596
Search 85,734 records →Explore disease epidemiology

Full-text diagnosis search · filters by taxon, species, sex, age, organ count, body system, and disease process · charts · CSV export

How to cite this database

Drury R. Reavill Pathology Database at UC Davis. Davis (CA): University of California, Davis, School of Veterinary Medicine; 2026. Available from: this website. Accessed October 17, 2026.

Data use

Search results under 1,000 records can be downloaded as CSV directly from the explorer. For larger extracts or research collaborations, email hbeaufrere@ucdavis.edu describing the purpose of your request and how the data will be used — approved requests receive a download access code that unlocks larger exports in the explorer. Patient identities are anonymized for public access.