Somebody Please Help Me!

[coolshannie]

I am so tired and all i want to do is go to sleep, but i cant because all I have been doing for the past 3 to 4 hours is searching for this answer that I can't find. If I go to school without this answer in my paper im doomed! The question is How do perwinkle ( which is a type of mollusc) communicate with other periwinkle. In other words how does this mollusc communicate with others of its same species?

Also I have the answer for this one, it is just what i thought was correct, but maybe if somone knows alot about birds they will no if this is correct.. The question was How does a Crab Plover sense its environment and then there were examples like, sonar of bats. Well my answer was birds just use their eyes to sense their environment just like most other animals. Is this answer correct? If someone could at least help me out with the top answer i would greatly appreciate it. Thank You so much

-shannie

 

[epcotfan]

I would think they use sound, hearing or smell.
http://omp.gso.uri.edu/work1/animals/use/1c.htm

 

[BuzzBoyMom]

http://birding.about.com/od/songsandcalls/a/birdcalls.htm

Hope you get your answer.

 

[Barb D]

Snails and slugs communicate... Maybe it's similar. http://www.madsci.org/posts/archives/feb98/887302435.Zo.r.html