Red-tailed Tropicbird
Phaethon rubricauda
The red-tailed tropicbird measures 95 to 104 cm (37 to 41 in) on average, which includes the 35 cm (14 in) tail streamers, and weighs around 800 g (30 oz). It has a wingspan of 111 to 119 cm (44 to 47 in). It has a streamlined but solid build with almost all-white plumage, often with a pink tinge. The sexes are similar in plumage. A dark brown comma-shaped stripe extends back from the lores, through and over the eyes and reaching the ear coverts. The iris is dark brown. The bill is bright red, slightly paler at the base and black around the nostrils.
ID text from Wikipedia, CC BY-SA 4.0
White-tailed Tropicbird
Phaethon lepturus
The adult white-tailed tropicbird is a slender, mainly white bird, 71–80 cm (28–31 in) long including the very long central tail feathers, which double its total length. The wingspan is 89–96 cm (35–38 in). The bird has a black band on the inner wing, a black eye-mask, and an orange-yellow to orange-red bill. The bill colour, pure white back and black wing bar distinguish this species from the red-billed tropicbird. The white-tailed tropicbird breeds on tropical islands, laying a single egg directly onto the ground or a cliff ledge.
ID text from Wikipedia, CC BY-SA 4.0
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