You are here. Cross U.S. Borders. Almost a million times each day, U.S. Customs and Border Patrol (CBP) officers welcome international travelers into the U.S. In screening both foreign visitors and returning U.S. citizens, CBP uses a variety of techniques to assure that global tourism remains safe and strong.
Birches are enchanting trees that embody beauty and grace. While most types of Birch trees grow to roughly 40 feet, some, such as the Paper and Yellow Birch can soar to 80 feet tall.irches are enchanting trees that embody beauty and grace. While most types of Birch trees grow to roughly 40 feet, some, such as the Paper and Yellow Birch can soar to 80 feet tall.
Fall foliage color is yellow. River birch trees can be grown in planting zones 4-9 to provide the landscape with fall foliage. Native to the Eastern U.S., they will reach a height of 40-70 feet with a spread of 25-35 feet. These specimens are full-sun trees, but they will also tolerate partial shade.