Cliff Swallows(Red-throated) 崖燕(岩燕) 6Z2K4188-1
Dear all, hope you don't mind and I study not much,
Parking lot of lakes, when I capture Western Grebe.
Heard so many sound from Swallows.
Many times with cycle eat and soil, have no idea why, what for with helpful.
Have three kinds of them is Tree Swallow and Barn Swallow and Cliff Swallow.
為甚麼??? 燕子需要吃土呢??? 請先進們解惑!!