Participants are selected through an annual Call for Proposals. The 2020 Call for Proposals is now open for applications. This will be the final call in the current programme, so there are no major changes to the four principal components of the international dimension. You can check the Erasmus + Programme Guide.
Opportunities for Higher Education Institutions: Opportunities exist for Nigerian Higher Education Institutions (Universities or equivalent) in four main areas:
International Credit Mobility for higher education students and staff
Deadline: Feb 5, 2020 by 12:00 Brussels
Erasmus Mundus Joint Masters degrees
Deadline: 13 Feb 2020 at 17:00 Brussels time
Capacity building in higher education
Deadline 5 Feb 2020 by 17:00 Brussels time
Jean Monnet activities
Deadline 20 February 2020 by 17:00 Brussels time
Opportunities for Nigerian Students to Apply Directly for Scholarships
Erasmus Mundus Joint Masters degree
Available Courses can be found here: https://eacea.ec.europa.eu/erasmus-plus/library/scholarships-catalogue_en
For the deadlines, check the websites of the Higher Education Institutions offering the Joint Masters Degree.