Table 2 Key to the Haemoproteus species of Accipitriformes birds

1 (6)

Fully grown gametocytes, which markedly displace nuclei of infected erythrocytes laterally, often close to the erythrocyte envelope, develop and are common (Fig. 3a, b, d)

2 (3)

Both broadly halteridial (Fig. 3a, d) and circumnuclear (Fig. 3c, f) fully grown gametocytes occur simultaneously

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H. janovyi (Fig. 3a–c) [3, 50]

3 (2)

Fully grown gametocytes predominantly are broadly halteridial (Fig. 3a, d). Circumnuclear fully grown gametocytes (Fig. 3c, f) are absent or occur only occasionally

4 (5)

Fully grown gametocytes fill the infected erythrocytes up to their poles (Fig. 3d)

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H. elani (Fig. 3d) [3, 51, 52]

5 (4)

Fully grown gametocytes predominantly do not fill the infected erythrocytes up to their poles (Fig. 3e)

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H. buteonis (Fig. 3e) [3, 53]

6 (1)

Fully grown gametocytes, which markedly displace nuclei of erythrocytes laterally, often close to the erythrocyte envelope (Fig. 3a, b, d), are absent or occur only occasionally. The majority of gametocytes grow around nuclei of the infected erythrocytes (Fig. 3f) and usually do not markedly displace the nuclei laterally (NDR is close to 1). Circumnuclear gametocytes (Fig. 3c, f) predominate among the fully grown gametocytes

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H. nisi (Fig. 3f) [3, 53, 54]