Are you talking about cowcatchers?
en.m.wikipedia.org
That wiki page should help. As you can see, they still exist in some form but tend to be less conspicuous on modern trains. You certainly don't tend to see the classic style in the UK outside of preserved decades-old stream engines.
That said, North American long distance trains often tend to seem quite old school compared to what you find in the UK and the continent.
I'm familiar with the term "cowcatcher" thanks to reading Thomas the Tank Engine books back when I was very young.