the bottom part is Wood or Tree, the top part is a bird flying from right to left, ready to land on the tree.
The bronze script is
there are three birds on the tree, which means "Gather".
The small seal script is
which is only one bird on tree.
Its clerical script is
similar to the small seal script, one bird on tree.
Why the later scripts have one bird on tree may be due to make writing simple and easy.
Its current standard printing script is
same as the clerical script.
The meaning of the character is more than Gather right now. It also means "Collect".
Its Pinyin is "Ji2".