Values in parentheses refer to mean, standard deviation and sample size. NHMUK = The Natural History Museum, Tring, UK; MZUM = Michigan State University Museum, Ann Arbor, USA; AMNH = American Museum of Natural History, New York, USA. Wing flattened and stretched (maximum chord); bill length to skull; bill depth at nostrils.
| Sex | Measurement | A. r. adamsi Sind (NHMUK) | A. r. krishnakumarsinhji Kathiawar (AMNH) | A. r. raytal West Bengal, Bihar (NHMUK) | A. r. raytal ("vauriei") Palasbari (MZUM) |
| Female | Wing | 77.0–84.0 (80.4; 2.23; 11) | 78.0–78.5 (78.2; 0.35; 2) | 75.5–82.5 (78.1; 3.04; 4) | 79.0–81.0 (79.7; 1.16; 3) |
| Tail | 41.5–48.0 (44.1; 2.02; 10) | 37.0–42.0 (39.5; 3.54; 2) | 38.5–47.0 (42.1; 3.54; 4) | 40.5–43.0 (41.5; 1.32; 3) | |
| Bill Length | 12.3–14.1 (13.1; 0.57; 11) | 12.5–12.8 (12.6; 0.21; 2) | 13.6–14.6 (14.0; 0.45; 4) | 13.7–15.4 (14.4; 0.87; 3) | |
| Bill Depth | 4.4–4.9 (4.7; 0.16; 10) | - | 4.3–4.5 (4.4; 0.12; 3) | 4.4 (–; –; 1) | |
| Tail/wing | 0.52–0.57 (0.55; 0.01; 10) | - | 0.50–0.57 (0.54; 0.03; 4) | - | |
| Male | Wing | 81.5–91.5 (87.5; 2.65; 13) | 82.0 (–; –; 1) | 82.5–86.0 (84.0; 1.12; 11) | 81.5–84.0 (83.2; 1.19; 4) |
| Tail | 45.0–49.5 (48.3; 1.38; 13) | 43 (–; –; 1) | 43.0–47.0 (45.1; 1.41; 11) | 44.0–47.0 (45.1; 1.32; 4) | |
| Bill Length | 12.4–14.5 (13.6; 0.60; 13) | 12.7 (–; –; 1) | 14.2–16.0 (15.0; 0.57; 11) | 14.1–15.3 (14.6; 0.51; 4) | |
| Bill Depth | 4.5–5.3 (4.8; 0.27; 8) | - | 4.3–4.9 (4.5; 0.19; 9) | 4.3–4.7 (4.4; 0.19; 4) | |
| Tail/wing | 0.54–0.57 (0.55; 0.01; 13) | - | 0.52–0.56 (0.54; 0.02; 11) | - |
Table from PA (unpublished data)