I can speak more to the terrestrial and perhaps Pardeep would like to speak to the aquatic.
A lot has to do with jurisdiction. Environment Canada has jurisdiction for migratory birds. We have a very mature act, the Migratory Birds Convention Act, and a lot of cooperation in North America and in fact in South America. There is a lot of bird monitoring. Pretty well all the birds are monitored to some degree or other.
In the early days those were birds that were considered more important to society, such as waterfowl, ducks for hunting. That is somewhat similar at the provincial level. The species for which the provincial government is obliged to understand the status so they can set hunting quotas is where monitoring is probably the most stringent and long term.