Colibri Advances Exploration at EP Gold Project: San Perfecto Drilling Campaign Gains Momentum in Prolific Caborca Gold Belt

Exploration Program Update

Colibri Resource Corporation (TSXV: CBI) has announced meaningful progress on its reverse circulation drilling initiative targeting the San Perfecto zone within the company’s wholly-owned EP Gold Project in Sonora, Mexico. The current campaign has successfully executed eleven RC drill holes, accumulating approximately 906 metres of penetration across the San Perfecto and Banco de Oro target areas. Operations remain on schedule with crews methodically advancing the systematic exploration program.

Sample Processing and Assay Timeline

Materials from completed drill intervals are currently undergoing preparation protocols prior to laboratory submission. Pending standard analytical turnaround intervals, the company anticipates receiving initial assay results from the opening phase of drilling in January 2026. This staged approach allows Colibri to refine targeting parameters as geochemical data becomes available.

Strategic Location Within a Tier-One Mining District

The EP Gold Project occupies a strategically advantageous position within the Caborca Gold Belt, recognized as one of Mexico’s most endowment-rich gold-bearing corridors. The property sits proximate to substantial mineral holdings controlled by major producers, including Fresnillo plc’s extensive regional portfolio exceeding 200,000 hectares. Colibri’s target drill locations are situated approximately 25 kilometres east of Fresnillo’s La Herradura Mine operation, roughly 8 kilometres from the former Noche Buena asset, and approximately 17 kilometres north of the Tajitos gold deposit currently under preliminary economic assessment.

(Note: The Qualified Person has no direct knowledge of mineralization on adjacent properties and cannot confirm its applicability to the EP Gold Project concession.)

Competitive Regional Mining Landscape

Sonora maintains its position as Mexico’s preeminent gold-producing state, with documented precious metals extraction spanning more than four centuries. The region hosts multiple advanced and producing projects managed by established sector operators, including Agnico Eagle’s La India Project, Osisko Development’s San Antonio initiative, Minera Alamos operations at Santana and Cerro de Oro, Aztec Minerals’ Cervantes asset, and Alamos Gold’s Mulatos district holdings. This concentration of activity underscores Sonora’s reputation as a mature, infrastructure-robust jurisdiction for mineral exploration and development.

Operational Environment and Regulatory Framework

Mexico continues to function as a significant jurisdiction for precious metals exploration, supported by established mining protocols and infrastructure networks. Federal authorities have recently signaled intentions to streamline permitting mechanisms and address historical application delays, recognizing mining’s strategic importance to the national economic framework. Recent examples from operating companies such as Silver Tiger Metals and Heliostar Metals demonstrate that project advancement and regulatory clearance processes continue functioning effectively within Mexico’s established framework, particularly in developed mining jurisdictions like Sonora.

Project Portfolio Overview

Beyond the San Perfecto drilling program, Colibri Resource maintains a diversified exploration portfolio. The company holds 100% interest in the EP Gold Project, a 49% participation interest in the Pilar Gold & Silver Project, and prospective claim positions at Diamante. Additional information regarding project specifics is available through the company website.

Technical Oversight

Jamie Lavigne, P. Geo, an independent Qualified Person under NI 43-101 standards, has reviewed and certified the technical accuracy of this disclosure.

Management Perspective

Ian McGavney, President and Chief Executive Officer, commented: “Our San Perfecto drilling program continues advancing according to plan, and our priority remains constructing a comprehensive geological database as the campaign progresses. We will maintain regular communication with stakeholders as additional work results emerge.”

Contact Information

Ian McGavney
President, CEO & Director
Colibri Resource Corporation
Tel: (506) 383-4274
Email: ianmcgavney@colibriresource.com

Website: www.colibriresource.com

This communication contains forward-looking statements subject to material risks and uncertainties. Actual outcomes may differ substantially from projections or expectations. Forward-looking references are identified through terminology such as “plan,” “expect,” “anticipate,” “intend,” and “believe,” and include statements regarding EP Gold Project potential. These statements are contingent upon assumptions and subject to numerous risks. Readers should exercise appropriate caution regarding forward-looking content and avoid excessive reliance on such statements. The company maintains no obligation to revise forward-looking statements except as mandated by applicable law.

Neither the TSX Venture Exchange nor its Regulation Services Provider provides endorsement of this release’s accuracy or completeness.