Cave Birdnest and Birdhouse Birdnest 山洞燕和屋燕的相比

洞燕会比屋燕来的多毛，颜色也比较黄。为了有效保护小燕子不被冻，洞燕会使用更多毛制作燕窝，这也是为什么洞燕会比较贵。以下图是洞燕燕窝
The Cave Birdnest, is with more fur and is black in overall. Due to cold conditions in cave, swiftlet uses more fur on making the nest to protect their offspring.  Here's the actual Cave Birdnest

Example of the real condition

Actual Birdnest from Cave

与屋燕相比下，洞燕被浸在水里后会呈糊状，不同屋燕还是条状。屋燕会比洞燕来得有口感。

When you soak it on water, Cave Birdnest become a very soft, glue like gel on the water. With compare with Birdhouse Birdnest, Birdhouse nest have more texture and firm.

下图为屋燕，显示屋燕是更加的干净

Birdhouse nest is cleaner and with less contaminative on the nest.

Birdnest from Birdhouse!

被良好控制的燕屋将产出形状漂亮，清洁的燕窝。With closed monitor, Birdhouse Birdnest is said to be cleaner and better in shape, when it comes to consumer, it is up to them to choose either cave or Birdhouse birdnest.