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The Foreign Policy association reports,

In order to return the biblical species of deer now known as the Persian Fallow Deer to Israel an espionage mission was set up by an Israeli general who was also a zealous conservationist.

Israel had struck a deal with the Shah of Iran and his son to capture two of the deer and bring them to Israel. However, they were not able to coordinate the conservation effort in time. One day before the revolution broke out a Dutch zoologist living in Israel was able to cross the border at the behest of General Avraham Yaffi, present false papers and capture the deer and safely bring them back to Israel. The deer have been well taken care of and have multiplied at the Bar- Hai Reserve. Four deer were released into the wild recently by Israeli zoologists.

This is interesting because it highlights that, before the revolution, Israel and Iran used to be very close and have stellar diplomatic relations.  For example, Wikipedia notes,

After the Six Day War, Iran supplied Israel with a significant portion of its oil needs and Iranian oil was shipped to European markets via the joint Israeli-Iranian Eilat-Ashkelon pipeline. Brisk trade between the countries continued until 1979. Israeli construction firms and engineers were active in Iran. Iranian-Israeli military links and projects were kept secret, but they are believed to have been wide-ranging, for example the joint military project Project Flower (1977-’79), an Iranian-Israeli attempt to develop a new missile.

Via.