ML201859571 IBC 1532094
יוצר
תאריך
מיקום
- גיל
- לא מוגדר
- זוויג
- לא מוגדר
הערות
Crested Terns fend off marauding Silver Gulls from their rookery. Crested Terns (Thalasseus bergii) breed in several rookeries on Penguin Island, part of the Shoalwater Islands Marine Park 50 km south of Perth, Western Australia. Losses of chicks and eggs are high, particularly by predation from Silver Gulls (Chroicocephalus novaehollandiae). The adult Terns sit tight on their nests, calling as the Gulls hover overhead or stand nearby, waiting for an opportunity to grab an egg or a small chick. Silver Gulls also harass adult Terns returning with fish for their chicks, repeatedly chasing them and often preventing them from landing at their nest. Elevation: 11 m. Date added to IBC: November 20, 2018.
פרטי השורה
IBC scientific name: Thalasseus bergii gwendolenae.
אוסף
מידע טכני
- מצלמה או מכשיר הקלטה
- מיקרופון
- עזרים
- גודל קובץ מקורי
- 88.54 MB