There are two seemingly contradictory accounts of creation in the Bible.
The first is in Genesis 1:1-2:3.
The second is in Genesis 2:4-25.
Why the differences in the accounts?
After even more study of Genesis, I think I may understand why the original question may have been asked.
Yes, there are 2 different accounts here, but they are of the same creation event. The first part is an account of God creating the universe and everything in it. The second part begins with the creation of Adam (which was mentioned in the first account), but then continues on with the story of Adam.
What I did not understand earlier was why someone would say there were contradictions, but now I believe one thing which may be in question is Genesis 2:19. I had been reading the NIV which says "Now the LORD God had formed out of the ground all the wild animals and all the birds in the sky. He brought them to the man to see what he would name them; and whatever the man called each living creature, that was its name." It says God had formed the animals, so it didn't seem contradictory. Other translations do use verbiage which would suggest man was created before animals in this account.
After searching a bit for information on the contradictions, I found that the Hebrew used in this verse does not specify an order. It can be translated as now or as in the past. I would think that people reading this in the original Hebrew language would understand that it was meant that God had already created the animals, since that was the order presented in chapter 1. Reference
These are definitely two different stories of God creating animals and plants. But understand that the first time God created these things, he created them in numbers. The second time that he created the animals He did so, so that Adam could name them.
Sorry for the short answer.
There are two accounts. The first one is God's account. The second account is that of Adam, and only describes things from his experience on the sixth day.
Many places in Genesis when there is a change of author, does the passage begin "These are the generations of..". Genesis is a collection of many personal accounts and includes kept genealogies that were compiled into one book. Examine Genesis 25 for an example of how this works.
If you look at the King James Version, you will notice the change from God being describe as "God" to being described as "the LORD God". This is because God wrote the first account and Adam wrote this second account.
On the sixth day, God creates land animals before creating man (Genesis 1:24-26). Adam sees God create one of each land animal and he named them (Genesis 2:19). One of each animal would not be sufficient to populate the earth; the earth was already full of land animals which were made earlier.
Also Adam's account describes the plants were already in the earth before he was formed, but hadn't started to grow yet (Genesis 2:5). So Adam's account is entirely consistent with plants having been made on day three (Genesis 1:11).
After making Adam God then makes a fully formed garden with fruit trees so Adam can eat (Genesis 2:8-9).
Adam witnesses God creating Eden and one of each animal. The two accounts both witness God as the creator. The difference stems from the fact that Adam only witnessed creation from when he was made on day six, and they describe different details of what happened.