Psittacines (Parrots)¶

Background¶

Psittacines (order Psittaciformes) encompass over 350 species of parrots, macaws, cockatoos, lorikeets, lovebirds, and budgerigars. They represent the largest group of captive birds tested at SENO, accounting for approximately 55% of all DNA sexing samples and 80% of disease testing samples. Parrots are prominently represented because: (1) many species are sexually monomorphic and require DNA sexing, (2) they are long-lived (20–80+ years) and often kept as companion animals, (3) they are susceptible to several species-specific viral diseases, and (4) the international pet trade and aviculture community demands reliable testing.

Common Species Tested¶

DNA Sexing Considerations¶

Small Psittacines (Lovebirds, Budgies, Parrotlets)¶

• Use 5–7 feathers for DNA extraction (small follicles = limited DNA yield)
• CHD-W and CHD-Z fragments with P2/P8 may be only 5–10 bp apart
• Capillary electrophoresis strongly recommended in place of gel-based analysis
• Disease screening: combined oral/cloacal swab recommended
• Lower blood volume limits in very small species (≤ 0.1 mL for birds under 50 g)

Medium Psittacines (Conures, Cockatiels, Ringnecks, Small Amazons)¶

• Use 3–5 feathers sufficient for both sexing and disease testing
• P2/P8 primer pair generally provides adequate separation
• Gel electrophoresis (2.5–3% agarose) usually sufficient for fragment discrimination
• Disease screening: separate oral swab for APV/PBFD if clinical signs present

Large Psittacines (Macaws, Cockatoos, African Greys)¶

• 2–3 feathers sufficient for sexing — the follicles are large and DNA-rich
• Preferred blood volume: 0.3–0.5 mL for disease testing
• P2/P8 primer pair gives reliable separation (15–25 bp difference typically)
• PBFD screening recommended for all new arrivals before introducing to collections
• Regular (quarterly to semi-annual) PBFD testing recommended for multi-bird facilities

Disease Testing¶

PBFD (Psittacine Beak and Feather Disease)¶

APV (Avian Polyomavirus)¶

Testing Recommendations for Aviculturists¶

CHD Fragment Size Summary¶

Cross-References¶

• Parrot DNA Sexing Guide — Species-specific CHD data
• PCR Sexing Method — Full protocol
• PBFD Disease Testing — PBFD qPCR details
• APV Disease Testing — APV qPCR details
• Species Compatibility Matrix
• Passerines (Canaries & Finches) Guide
• Feather Collection Protocol
• Sample Storage and Stability

Frequently Asked Questions¶

Q: Do all parrot species need the same primer set? A: Most large and medium parrots work well with P2/P8. Small parrots (budgies, lovebirds, parrotlets) sometimes require the 2550F/2718R alternative primer set because the CHD-W and CHD-Z fragments are very close in size with P2/P8.

Q: Should I test my parrot for PBFD even if it looks healthy? A: Yes, especially if you have multiple birds or plan to introduce the bird to an existing collection. BFDV-infected birds can be asymptomatic carriers, shedding virus intermittently without visible signs. Pre-introduction testing is the only way to identify these carriers.

Q: Can I use the same feather sample for both DNA sexing and disease testing? A: For standard testing, feathers are used for DNA sexing (genomic DNA) and separate swabs are preferred for disease testing (viral DNA/RNA). However, if only feathers are available, the DNA extract can be tested for both purposes if extraction yields sufficient material.

Q: Why is APV more common in budgerigars than in other parrots? A: Budgerigars (Melopsittacus undulatus) are considered the primary natural reservoir of APV. The virus was historically named "Budgerigar Fledgling Disease" due to its high prevalence and mortality in young budgerigars. Other psittacine species can be infected but are generally less susceptible.

Last updated: August 2026