Hi BBM2, aristo & chrise, sorry for any particular consternation.
A bit of a liberty surface wise in terms of evolution/creationism whichever is one's won't as no birds (yet discovered ?) use echo-sounding but a few,like bats, use echo-location (as no doubt a pedant would point out). However, this is crossword land and I believe the wordplay to be ok.
This gull (as aristo correctly surmises is the definition) and with the probing (sounding) of echo before L (first light) might give screech-owl; a bird found in the "Americas".
I'll grab my coat.