Ainley's Storm-petrel vs Tristram's Storm-petrel
Hydrobates cheimomnestes в сравнении с Hydrobates tristrami
Side-by-Side Comparison
| Характеристика | Ainley's Storm-petrel | Tristram's Storm-petrel |
|---|---|---|
| Научное название | Hydrobates cheimomnestes | Hydrobates tristrami |
| Отряд | Procellariiformes | Procellariiformes |
| Семейство | Hydrobatidae | Hydrobatidae |
| Охранный статус | Vulnerable | Least Concern |
| Длина | — | — |
| Размах крыльев | 30,1 cm (11.9 in) | 35,5 cm (14.0 in) |
| Масса | 41,15 g (1.45 oz) | 89,0 g (3.14 oz) |
| Питание | -- | -- |
| Размер кладки | 1 | 1 |
| Population Trend | — | — |
Охранный статус
Vulnerable
Ainley's Storm-petrel
Least Concern
Tristram's Storm-petrel
About These Birds
Ainley's Storm-petrel
Ainley's Storm-petrel, 19–21 cm, is a recently described species breeding on the Channel Islands off California, present in winter — unusual among storm-petrels which typically breed in summer. Dark overall, white rump with central grey stripe. Vulnerable; small population and restricted range.
Tristram's Storm-petrel
Tristram's Storm-petrel, 24–25 cm, is one of the largest storm-petrels, breeding on small Hawaiian and Ogasawara Islands in the North Pacific. All dark; broad wings, moderate tail fork. Nocturnal at colonies in winter (October–April). Planktivore; poorly known at sea; winters south into tropical Pacific.